diff --git a/pom.xml b/pom.xml
new file mode 100644
index 0000000..3d0f01f
--- /dev/null
+++ b/pom.xml
@@ -0,0 +1,78 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>3.3.4</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+    <groupId>com.Activity</groupId>
+    <artifactId>demo13</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>demo13</name>
+    <description>demo13</description>
+    <url/>
+    <licenses>
+        <license/>
+    </licenses>
+    <developers>
+        <developer/>
+    </developers>
+    <scm>
+        <connection/>
+        <developerConnection/>
+        <tag/>
+        <url/>
+    </scm>
+    <properties>
+        <java.version>17</java.version>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-devtools</artifactId>
+            <scope>runtime</scope>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <configuration>
+                    <excludes>
+                        <exclude>
+                            <groupId>org.projectlombok</groupId>
+                            <artifactId>lombok</artifactId>
+                        </exclude>
+                    </excludes>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
diff --git a/src/main/java/com/example/demo/Chapter.java b/src/main/java/com/example/demo/Chapter.java
new file mode 100644
index 0000000..ed3ef07
--- /dev/null
+++ b/src/main/java/com/example/demo/Chapter.java
@@ -0,0 +1,83 @@
+package com.example.demo;
+
+
+import jakarta.persistence.*;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.RequiredArgsConstructor;
+
+import java.util.List;
+
+@Entity
+@Data
+@RequiredArgsConstructor
+
+
+public class Chapter {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+
+    private Long id;
+    private String name;
+
+    private String district;
+
+    @OneToOne
+    @JoinColumn(name = "president_id")
+    private Member president;
+
+    @OneToMany
+    @JoinColumn(name = "chapter_id")
+    private List<Member> members;
+
+
+    public Chapter(Long id, String name, String district, Member president, List<Member> members) {
+        this.id = id;
+        this.name = name;
+        this.district = district;
+        this.president = president;
+        this.members = members;
+
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDistrict() {
+        return district;
+    }
+
+    public void setDistrict(String district) {
+        this.district = district;
+    }
+
+    public Member getPresident() {
+        return president;
+    }
+
+    public void setPresident(Member president) {
+        this.president = president;
+    }
+
+    public List<Member> getMembers() {
+        return members;
+    }
+
+    public void setMembers(List<Member> members) {
+        this.members = members;
+    }
+}
diff --git a/src/main/java/com/example/demo/Conference.java b/src/main/java/com/example/demo/Conference.java
new file mode 100644
index 0000000..6fedd1a
--- /dev/null
+++ b/src/main/java/com/example/demo/Conference.java
@@ -0,0 +1,30 @@
+package com.example.demo;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.OneToMany;
+
+import java.time.LocalDate;
+import java.util.List;
+
+@Entity
+public class Conference extends Event{
+
+
+    @OneToMany
+    @JoinColumn(name = "conference_id")
+    private List<Speaker> speakers;
+
+    public Conference(Long id, LocalDate date, int duration, String location, String title, List<Guest> guests, List<Speaker> speakers) {
+        super(id, date, duration, location, title, guests);
+        this.speakers = speakers;
+    }
+
+    public List<Speaker> getSpeakers() {
+        return speakers;
+    }
+
+    public void setSpeakers(List<Speaker> speakers) {
+        this.speakers = speakers;
+    }
+}
diff --git a/src/main/java/com/example/demo/Demo13Application.java b/src/main/java/com/example/demo/Demo13Application.java
new file mode 100644
index 0000000..9cf8c94
--- /dev/null
+++ b/src/main/java/com/example/demo/Demo13Application.java
@@ -0,0 +1,13 @@
+package com.example.demo;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Demo13Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Demo13Application.class, args);
+    }
+
+}
diff --git a/src/main/java/com/example/demo/Event.java b/src/main/java/com/example/demo/Event.java
new file mode 100644
index 0000000..9cde8bd
--- /dev/null
+++ b/src/main/java/com/example/demo/Event.java
@@ -0,0 +1,89 @@
+package com.example.demo;
+
+
+import jakarta.persistence.*;
+
+import java.time.LocalDate;
+import java.util.List;
+
+@Entity
+public abstract class Event {
+
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    private LocalDate date;
+
+    private int duration;  // duration in hours
+
+    private String location;
+
+    private String title;
+
+    @OneToMany
+    @JoinColumn(name = "event_id")
+    private List<Guest> guests;
+
+    public Event(Long id, LocalDate date, int duration, String location, String title, List<Guest> guests) {
+        this.id = id;
+        this.date = date;
+        this.duration = duration;
+        this.location = location;
+        this.title = title;
+        this.guests = guests;
+    }
+
+    public Event() {
+
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public LocalDate getDate() {
+        return date;
+    }
+
+    public void setDate(LocalDate date) {
+        this.date = date;
+    }
+
+    public int getDuration() {
+        return duration;
+    }
+
+    public void setDuration(int duration) {
+        this.duration = duration;
+    }
+
+    public String getLocation() {
+        return location;
+    }
+
+    public void setLocation(String location) {
+        this.location = location;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public List<Guest> getGuests() {
+        return guests;
+    }
+
+    public void setGuests(List<Guest> guests) {
+        this.guests = guests;
+    }
+}
diff --git a/src/main/java/com/example/demo/Exposition.java b/src/main/java/com/example/demo/Exposition.java
new file mode 100644
index 0000000..a99a170
--- /dev/null
+++ b/src/main/java/com/example/demo/Exposition.java
@@ -0,0 +1,20 @@
+package com.example.demo;
+
+
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jdk.jfr.Enabled;
+
+import java.time.LocalDate;
+import java.util.List;
+
+@Enabled
+public class Exposition extends Event {
+
+    public Exposition(Long id, LocalDate date, int duration, String location, String title, List<Guest> guests) {
+        super(id, date, duration, location, title, guests);
+    }
+}
+
+
diff --git a/src/main/java/com/example/demo/Guest.java b/src/main/java/com/example/demo/Guest.java
new file mode 100644
index 0000000..8bcdeb9
--- /dev/null
+++ b/src/main/java/com/example/demo/Guest.java
@@ -0,0 +1,54 @@
+package com.example.demo;
+
+
+import jakarta.persistence.*;
+
+@Entity
+public class Guest {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+
+    private Long id;
+    private String name;
+
+    @Enumerated(EnumType.STRING)
+    private ResponseStatus status;
+
+    public Guest(Long id, String name, ResponseStatus status) {
+        this.id = id;
+        this.name = name;
+        this.status = status;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public ResponseStatus getStatus() {
+        return status;
+    }
+
+    public void setStatus(ResponseStatus status) {
+        this.status = status;
+    }
+
+    public enum ResponseStatus {
+        ATENDING,
+        NOT_ATENDING,
+        NO_RESPONSE,
+    }
+}
+
diff --git a/src/main/java/com/example/demo/Member.java b/src/main/java/com/example/demo/Member.java
new file mode 100644
index 0000000..5062c4d
--- /dev/null
+++ b/src/main/java/com/example/demo/Member.java
@@ -0,0 +1,69 @@
+package com.example.demo;
+
+
+import ch.qos.logback.core.status.Status;
+import jakarta.persistence.*;
+
+import java.time.LocalDate;
+
+@Entity
+
+public class Member {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+
+    private Long id;
+
+    private String name;
+
+    @Enumerated(EnumType.STRING)
+
+    private Status status;
+
+    private LocalDate renewalDate;
+
+    public Member(Long id, String name, Status status, LocalDate renewalDate) {
+        this.id = id;
+        this.name = name;
+        this.status = status;
+        this.renewalDate = renewalDate;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Status getStatus() {
+        return status;
+    }
+
+    public void setStatus(Status status) {
+        this.status = status;
+    }
+
+    public LocalDate getRenewalDate() {
+        return renewalDate;
+    }
+
+    public void setRenewalDate(LocalDate renewalDate) {
+        this.renewalDate = renewalDate;
+    }
+    public enum Status {
+        ACTIVE,
+        LAPSED,
+
+    }
+}
diff --git a/src/main/java/com/example/demo/Speaker.java b/src/main/java/com/example/demo/Speaker.java
new file mode 100644
index 0000000..27c7363
--- /dev/null
+++ b/src/main/java/com/example/demo/Speaker.java
@@ -0,0 +1,50 @@
+package com.example.demo;
+
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+
+@Entity
+public class Speaker {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+
+    private Long id;
+
+    private String name;
+
+    private int presentationDuration;
+
+    public Speaker(String name, Long id, int presentationDuration) {
+        this.name = name;
+        this.id = id;
+        this.presentationDuration = presentationDuration;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getPresentationDuration() {
+        return presentationDuration;
+    }
+
+    public void setPresentationDuration(int presentationDuration) {
+        this.presentationDuration = presentationDuration;
+    }
+}
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
new file mode 100644
index 0000000..2e65423
--- /dev/null
+++ b/src/main/resources/application.properties
@@ -0,0 +1,6 @@
+spring.application.name=demo13
+spring.datasource.username=root
+spring.datasource.password=Ei28021994@
+spring.jpa.hibernate.ddl-auto=create
+spring.jpa.show-sql=true
+spring.datasource.url=jdbc:mysql://localhost:3306/book_db
diff --git a/src/test/java/com/example/demo/Demo13ApplicationTests.java b/src/test/java/com/example/demo/Demo13ApplicationTests.java
new file mode 100644
index 0000000..0609c75
--- /dev/null
+++ b/src/test/java/com/example/demo/Demo13ApplicationTests.java
@@ -0,0 +1,13 @@
+package com.example.demo;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class Demo13ApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}