diff --git a/src/main/java/cn/teammodel/controller/HelloController.java b/src/main/java/cn/teammodel/controller/HelloController.java
index 0337a44..e0cac8a 100644
--- a/src/main/java/cn/teammodel/controller/HelloController.java
+++ b/src/main/java/cn/teammodel/controller/HelloController.java
@@ -1,26 +1,32 @@
 package cn.teammodel.controller;
 
 import cn.teammodel.common.R;
+import cn.teammodel.dao.EvaluationTreeRepository;
 import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.security.core.context.SecurityContextHolder;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
+import javax.annotation.Resource;
+
 @RestController
 @RequestMapping("/")
 public class HelloController {
 
+    @Resource
+    private EvaluationTreeRepository evaluationTreeRepository;
+
     @GetMapping("hello")
     @PreAuthorize("@ss.hasRole('admin')")
-    public R hello() {
+    public R<String> hello() {
         System.out.println(SecurityContextHolder.getContext().getAuthentication());
+
         return new R(200, "success","hello world");
     }
     @GetMapping("public/free")
     @PreAuthorize("permitAll()")
-    public R free() {
-        System.out.println(SecurityContextHolder.getContext().getAuthentication());
+    public R<String> free() {
         return new R(200, "success","hello world");
     }
 }
\ No newline at end of file
diff --git a/src/main/java/cn/teammodel/dao/EvaluationTreeRepository.java b/src/main/java/cn/teammodel/dao/EvaluationTreeRepository.java
new file mode 100644
index 0000000..3a96a5d
--- /dev/null
+++ b/src/main/java/cn/teammodel/dao/EvaluationTreeRepository.java
@@ -0,0 +1,22 @@
+package cn.teammodel.dao;
+
+import cn.teammodel.model.entity.EvaluationTree;
+import com.azure.spring.data.cosmos.repository.CosmosRepository;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.stereotype.Repository;
+
+/**
+ * @author winter
+ * @create 2023-11-20 14:39 <br/>
+ * Page<User> findByLastname(String lastname, Pageable pageable); <br/>
+ * Slice<User> findByLastname(String lastname, Pageable pageable);<br/>
+ * Window<User> findTop10ByLastname(String lastname, ScrollPosition position, Sort sort);<br/>
+ * List<User> findByLastname(String lastname, Sort sort);<br/>
+ * List<User> findByLastname(String lastname, Sort sort, Limit limit);<br/>
+ * List<User> findByLastname(String lastname, Pageable pageable);<br/>
+ */
+@Repository
+public interface EvaluationTreeRepository extends CosmosRepository<EvaluationTree, String> {
+    Page<EvaluationTree> findById(String lastname, Pageable pageable);
+}
diff --git a/src/main/java/cn/teammodel/dao/StudentRepository.java b/src/main/java/cn/teammodel/dao/StudentRepository.java
new file mode 100644
index 0000000..9531269
--- /dev/null
+++ b/src/main/java/cn/teammodel/dao/StudentRepository.java
@@ -0,0 +1,11 @@
+package cn.teammodel.dao;
+
+import cn.teammodel.model.entity.Student;
+import com.azure.spring.data.cosmos.repository.CosmosRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface StudentRepository extends CosmosRepository<Student, String> {
+
+    //Flux<Student> findById(String id);
+}
\ No newline at end of file
diff --git a/src/main/java/cn/teammodel/model/entity/EvaluationTree.java b/src/main/java/cn/teammodel/model/entity/EvaluationTree.java
new file mode 100644
index 0000000..bd196e7
--- /dev/null
+++ b/src/main/java/cn/teammodel/model/entity/EvaluationTree.java
@@ -0,0 +1,36 @@
+package cn.teammodel.model.entity;
+
+import com.azure.spring.data.cosmos.core.mapping.Container;
+import com.azure.spring.data.cosmos.core.mapping.GeneratedValue;
+import com.azure.spring.data.cosmos.core.mapping.PartitionKey;
+import lombok.Data;
+import lombok.ToString;
+import org.springframework.data.annotation.Id;
+
+import java.util.List;
+
+/**
+ * 评价列表
+ * @author winter
+ * @create 2023-11-20 11:04
+ */
+@Container(containerName = "School")
+@Data
+@ToString
+public class EvaluationTree {
+    @Id
+    @GeneratedValue
+    String id;
+    /**
+     * 分区键: evaluation
+     */
+    @PartitionKey
+    String code;
+    /**
+    * 学段 id
+    */
+    String campusId;
+
+    List<EvaluationTreeNode> nodes;
+
+}
diff --git a/src/main/java/cn/teammodel/model/entity/EvaluationTreeNode.java b/src/main/java/cn/teammodel/model/entity/EvaluationTreeNode.java
new file mode 100644
index 0000000..94e5e75
--- /dev/null
+++ b/src/main/java/cn/teammodel/model/entity/EvaluationTreeNode.java
@@ -0,0 +1,16 @@
+package cn.teammodel.model.entity;
+
+import lombok.Data;
+import org.springframework.data.annotation.Transient;
+
+import java.util.List;
+
+@Data
+public class EvaluationTreeNode {
+    String id;
+    String pid;
+    String name;
+    Integer score;
+    @Transient
+    List<EvaluationTreeNode> children;
+}
diff --git a/src/main/java/cn/teammodel/model/entity/Student.java b/src/main/java/cn/teammodel/model/entity/Student.java
new file mode 100644
index 0000000..1d87e34
--- /dev/null
+++ b/src/main/java/cn/teammodel/model/entity/Student.java
@@ -0,0 +1,47 @@
+package cn.teammodel.model.entity;
+
+import com.azure.spring.data.cosmos.core.mapping.Container;
+import com.azure.spring.data.cosmos.core.mapping.PartitionKey;
+import lombok.Data;
+import org.springframework.data.annotation.Id;
+
+import java.util.List;
+
+
+@Data
+@Container(containerName = "Student")
+public class Student {
+    @Id
+    private String	id;
+    @PartitionKey
+    private String	code;
+    private String	mail;
+    private String	mobile;
+    private String	country;
+    private String	name;
+    private String	picture;
+    private String	schoolId;
+    private String	pw;
+    private String	salt;
+    private Integer	year;
+    private String	no;
+    private String	irs;
+    private String	classId;
+    private String	groupId;
+    private String	groupName;
+    private String	periodId;
+    private String	gender;
+    private Integer	graduate;
+    private List<String>	loginInfos;
+    private Integer	createTime;
+    private List<String> guardians;
+    private String	pk;
+    private Integer	ttl;
+    private String	_rid;
+    private String	_self;
+    private String	_etag;
+    private String	_attachments;
+    private Integer	_ts;
+
+}
+
diff --git a/src/main/java/cn/teammodel/service/EvaluationTreeService.java b/src/main/java/cn/teammodel/service/EvaluationTreeService.java
new file mode 100644
index 0000000..8caf3bd
--- /dev/null
+++ b/src/main/java/cn/teammodel/service/EvaluationTreeService.java
@@ -0,0 +1,13 @@
+package cn.teammodel.service;
+
+import cn.teammodel.model.entity.EvaluationTreeNode;
+
+import java.util.List;
+
+/**
+ * @author winter
+ * @create 2023-11-20 17:46
+ */
+public interface EvaluationTreeService {
+    List<EvaluationTreeNode> buildTree(List<EvaluationTreeNode> nodes);
+}
diff --git a/src/main/java/cn/teammodel/service/impl/EvaluationTreeServiceImpl.java b/src/main/java/cn/teammodel/service/impl/EvaluationTreeServiceImpl.java
new file mode 100644
index 0000000..ce46cd5
--- /dev/null
+++ b/src/main/java/cn/teammodel/service/impl/EvaluationTreeServiceImpl.java
@@ -0,0 +1,59 @@
+package cn.teammodel.service.impl;
+
+import cn.teammodel.model.entity.EvaluationTreeNode;
+import cn.teammodel.service.EvaluationTreeService;
+import org.apache.commons.lang3.StringUtils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @author winter
+ * @create 2023-11-20 17:47
+ */
+public class EvaluationTreeServiceImpl implements EvaluationTreeService {
+
+    @Override
+    public List<EvaluationTreeNode> buildTree(List<EvaluationTreeNode> nodes) {
+        List<EvaluationTreeNode> parents = new ArrayList<>();
+        // pid 为 null 或者 "" 则为 parents
+        for (EvaluationTreeNode node : nodes) {
+            if (StringUtils.isBlank(node.getPid())) {
+                parents.add(node);
+            }
+        }
+
+        // 迭代构建孩子节点
+        for (EvaluationTreeNode parent : parents) {
+            buildChildren(parent, nodes);
+        }
+        return parents;
+    }
+
+    /**
+     * 递归的构建父亲节点的孩子,以及孩子的孩子 (理论无极树,但应该考虑是否增加递归深度)
+     */
+    private void buildChildren(EvaluationTreeNode parent, List<EvaluationTreeNode> nodes) {
+        List<EvaluationTreeNode> children = getChildren(parent, nodes);
+        if (children.size() > 0) return;
+
+        parent.setChildren(children);
+        for (EvaluationTreeNode child : children) {
+            // 如果子节点还有孩子的话,就继续递归构建
+            if (getChildren(child, nodes).size() > 0) {
+                buildChildren(child, nodes);
+            }
+        }
+
+    }
+
+    private List<EvaluationTreeNode> getChildren(EvaluationTreeNode parent, List<EvaluationTreeNode> nodes) {
+        List<EvaluationTreeNode> children = new ArrayList<>();
+        for (EvaluationTreeNode node : nodes) {
+            if (node.getPid().equals(parent.getId())) {
+                children.add(node);
+            }
+        }
+        return children;
+    }
+}
diff --git a/src/test/java/cn/teammodel/TeamModelExtensionApplicationTests.java b/src/test/java/cn/teammodel/TeamModelExtensionApplicationTests.java
index 9064105..8a3ad41 100644
--- a/src/test/java/cn/teammodel/TeamModelExtensionApplicationTests.java
+++ b/src/test/java/cn/teammodel/TeamModelExtensionApplicationTests.java
@@ -1,19 +1,77 @@
 package cn.teammodel;
 
+import cn.teammodel.dao.EvaluationTreeRepository;
+import cn.teammodel.dao.StudentRepository;
 import cn.teammodel.manager.DingAlertNotifier;
+import cn.teammodel.model.entity.EvaluationTree;
+import cn.teammodel.model.entity.EvaluationTreeNode;
+import cn.teammodel.model.entity.Student;
+import com.azure.cosmos.models.PartitionKey;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
 @SpringBootTest
 class TeamModelExtensionApplicationTests {
 
     @Autowired
     private DingAlertNotifier notifier;
 
+    @Autowired
+    StudentRepository studentRepository;
+    @Autowired
+    private EvaluationTreeRepository evaluationTreeRepository;
+
     @Test
     void contextLoads() {
         notifier.send("告警: 测试消息推送封装模块");
     }
 
+    @Test
+    public void testCrud() {
+        EvaluationTree evaluationTree = new EvaluationTree();
+        evaluationTree.setCode("evaluation");
+        evaluationTree.setCampusId("default");
+        List<EvaluationTreeNode> nodes = new ArrayList<>();
+
+        // 1
+        String rootId = UUID.randomUUID().toString();
+        EvaluationTreeNode node = new EvaluationTreeNode();
+        node.setId(rootId);
+        node.setPid(null);
+        node.setName("root");
+        node.setScore(0);
+        // 2
+        EvaluationTreeNode node1 = new EvaluationTreeNode();
+        String subId = UUID.randomUUID().toString();
+        node.setId(subId);
+        node.setPid(rootId);
+        node.setName("child-1");
+        node.setScore(0);
+        // 3
+        EvaluationTreeNode node2 = new EvaluationTreeNode();
+        node.setId(UUID.randomUUID().toString());
+        node.setPid(subId);
+        node.setName("child-2");
+        node.setScore(0);
+        nodes.add(node);
+        nodes.add(node1);
+        nodes.add(node2);
+        evaluationTree.setNodes(nodes);
+
+        EvaluationTree saved = evaluationTreeRepository.save(evaluationTree);
+        System.out.println(saved);
+    }
+
+    @Test
+    public void testSelect() {
+        Optional<Student> s = studentRepository.findById("24913", new PartitionKey("Base-hbcn"));
+        System.out.println(s.orElse(null));
+    }
+
 }