diff --git a/src/main/kotlin/cn/edu/hfut/auto/knowledge/controller/KnowledgeController.kt b/src/main/kotlin/cn/edu/hfut/auto/knowledge/controller/KnowledgeController.kt
index b011dc4..1b7055d 100644
--- a/src/main/kotlin/cn/edu/hfut/auto/knowledge/controller/KnowledgeController.kt
+++ b/src/main/kotlin/cn/edu/hfut/auto/knowledge/controller/KnowledgeController.kt
@@ -16,11 +16,14 @@ import org.apache.kafka.common.KafkaException
 import org.babyfish.jimmer.kt.new
 import org.springframework.kafka.core.KafkaTemplate
 import org.springframework.transaction.annotation.Transactional
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.PathVariable
 import org.springframework.web.bind.annotation.PostMapping
 import org.springframework.web.bind.annotation.RequestBody
 import org.springframework.web.bind.annotation.RequestMapping
 import org.springframework.web.bind.annotation.RestController
 import java.time.LocalDateTime
+import java.util.UUID
 
 const val UPLOAD_FILE_TOPIC = "upload_file"
 
@@ -32,6 +35,10 @@ class KnowledgeController(
     private val knowledgeFileAttributeRepository: KnowledgeFileAttributeRepository
 ) {
 
+    @GetMapping("/{knowledgeId}")
+    suspend fun getKnowledgeBrief(@PathVariable knowledgeId: UUID): Knowledge =
+        knowledgeRepository.findNullable(knowledgeId, Knowledge.AS_PARENT_FETCHER) ?: throw BusinessError(ErrorCode.RESOURCE_NOT_FOUND)
+
     @SaCheckRole("1")
     @Transactional(rollbackFor = [Throwable::class])
     @PostMapping("/file")
diff --git a/src/main/kotlin/cn/edu/hfut/auto/knowledge/controller/TagController.kt b/src/main/kotlin/cn/edu/hfut/auto/knowledge/controller/TagController.kt
new file mode 100644
index 0000000..4d642b3
--- /dev/null
+++ b/src/main/kotlin/cn/edu/hfut/auto/knowledge/controller/TagController.kt
@@ -0,0 +1,27 @@
+package cn.edu.hfut.auto.knowledge.controller
+
+import cn.dev33.satoken.annotation.SaCheckRole
+import cn.edu.hfut.auto.knowledge.entity.Tag
+import cn.edu.hfut.auto.knowledge.repository.TagRepository
+import org.springframework.web.bind.annotation.*
+
+@RequestMapping("/tag")
+@RestController
+class TagController(
+    private val tagRepository: TagRepository
+) {
+    @GetMapping
+    suspend fun queryTags(name: String): List<Tag> = tagRepository.findTagsByNameStartsWith(name)
+
+    @SaCheckRole("1")
+    @PutMapping
+    suspend fun putTags(@RequestBody tags: List<Tag>) {
+        val deleting = tagRepository.findAll()
+            .toMutableSet()
+            .apply {
+                removeAll(tags.toSet())
+            }
+        tagRepository.deleteAll(deleting)
+        tagRepository.saveAll(tags)
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/cn/edu/hfut/auto/knowledge/controller/UserController.kt b/src/main/kotlin/cn/edu/hfut/auto/knowledge/controller/UserController.kt
new file mode 100644
index 0000000..0af7999
--- /dev/null
+++ b/src/main/kotlin/cn/edu/hfut/auto/knowledge/controller/UserController.kt
@@ -0,0 +1,25 @@
+package cn.edu.hfut.auto.knowledge.controller
+
+import cn.edu.hfut.auto.knowledge.entity.User
+import cn.edu.hfut.auto.knowledge.exception.BusinessError
+import cn.edu.hfut.auto.knowledge.exception.ErrorCode
+import cn.edu.hfut.auto.knowledge.repository.UserRepository
+import cn.edu.hfut.auto.knowledge.util.getLoginUser
+import com.fasterxml.jackson.databind.ObjectMapper
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.PathVariable
+import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.RestController
+
+@RequestMapping("/user")
+@RestController
+class UserController(
+    private val userRepository: UserRepository,
+    private val objectMapper: ObjectMapper
+) {
+    @GetMapping(path = ["", "/{userId}"])
+    suspend fun getUserInformation(@PathVariable(required = false) userId: Long?): User =
+        userRepository.findNullable(userId ?: getLoginUser(objectMapper).id, User.BRIEF_FETCHER)
+            ?: throw BusinessError(ErrorCode.RESOURCE_NOT_FOUND)
+
+}
\ No newline at end of file
diff --git a/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/Knowledge.kt b/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/Knowledge.kt
index 969ef9d..55ba131 100644
--- a/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/Knowledge.kt
+++ b/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/Knowledge.kt
@@ -28,12 +28,13 @@ interface Knowledge {
     companion object {
         val BRIEF_FETCHER = newFetcher(Knowledge::class).by {
             allScalarFields()
-            knowledgeFileAttribute()
+            knowledgeFileAttribute(KnowledgeFileAttribute.BRIEF_FETCHER)
         }
         val AS_PARENT_FETCHER = newFetcher(Knowledge::class).by {
             allScalarFields()
+            parent()
             children(BRIEF_FETCHER)
-            knowledgeFileAttribute()
+            knowledgeFileAttribute(KnowledgeFileAttribute.BRIEF_FETCHER)
         }
         val AS_CHILD_FETCHER = newFetcher(Knowledge::class).by {
             allScalarFields()
diff --git a/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/KnowledgeFileAttribute.kt b/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/KnowledgeFileAttribute.kt
index 02edafd..5f00ff2 100644
--- a/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/KnowledgeFileAttribute.kt
+++ b/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/KnowledgeFileAttribute.kt
@@ -1,6 +1,7 @@
 package cn.edu.hfut.auto.knowledge.entity
 
 import org.babyfish.jimmer.sql.*
+import org.babyfish.jimmer.sql.kt.fetcher.newFetcher
 import org.babyfish.jimmer.sql.meta.UUIDIdGenerator
 import java.util.*
 
@@ -28,4 +29,13 @@ interface KnowledgeFileAttribute {
 
     @ManyToMany(mappedBy = "knowledgeFiles")
     val notes: List<Note>
+
+    companion object {
+        val BRIEF_FETCHER = newFetcher(KnowledgeFileAttribute::class).by {
+            allScalarFields()
+            tags {
+                allScalarFields()
+            }
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/Notice.kt b/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/Notice.kt
index 74ce10b..e1534e2 100644
--- a/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/Notice.kt
+++ b/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/Notice.kt
@@ -4,6 +4,7 @@ import org.babyfish.jimmer.sql.Entity
 import org.babyfish.jimmer.sql.GeneratedValue
 import org.babyfish.jimmer.sql.Id
 import org.babyfish.jimmer.sql.ManyToOne
+import org.babyfish.jimmer.sql.kt.fetcher.newFetcher
 import org.babyfish.jimmer.sql.meta.UUIDIdGenerator
 import java.time.LocalDateTime
 import java.util.*
@@ -15,10 +16,21 @@ interface Notice {
     val id: UUID
     val viewed: Boolean
     val createTime: LocalDateTime
+
     @ManyToOne
     val note: Note
+
     @ManyToOne
     val comment: Comment
+
     @ManyToOne
     val targetUser: User
+
+    companion object {
+        val BRIEF_FETCHER = newFetcher(Notice::class).by {
+            allScalarFields()
+            note { allScalarFields() }
+            comment { allScalarFields() }
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/User.kt b/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/User.kt
index e9f95ec..de0ca90 100644
--- a/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/User.kt
+++ b/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/User.kt
@@ -2,6 +2,7 @@ package cn.edu.hfut.auto.knowledge.entity
 
 import com.fasterxml.jackson.annotation.JsonIgnore
 import org.babyfish.jimmer.sql.*
+import org.babyfish.jimmer.sql.kt.fetcher.newFetcher
 
 @Entity
 @Table(name = "t_user")
@@ -28,4 +29,12 @@ interface User {
 
     @ManyToMany(mappedBy = "starers")
     val starredNotes: List<Note>
+
+    companion object {
+        val BRIEF_FETCHER = newFetcher(User::class).by {
+            allScalarFields()
+            password(false)
+            notices(Notice.BRIEF_FETCHER)
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/cn/edu/hfut/auto/knowledge/repository/TagRepository.kt b/src/main/kotlin/cn/edu/hfut/auto/knowledge/repository/TagRepository.kt
new file mode 100644
index 0000000..27879d7
--- /dev/null
+++ b/src/main/kotlin/cn/edu/hfut/auto/knowledge/repository/TagRepository.kt
@@ -0,0 +1,8 @@
+package cn.edu.hfut.auto.knowledge.repository
+
+import cn.edu.hfut.auto.knowledge.entity.Tag
+import org.babyfish.jimmer.spring.repository.KRepository
+
+interface TagRepository : KRepository<Tag, Long> {
+    fun findTagsByNameStartsWith(name: String): List<Tag>
+}
\ No newline at end of file
diff --git a/src/main/kotlin/cn/edu/hfut/auto/knowledge/util/PermissionUtils.kt b/src/main/kotlin/cn/edu/hfut/auto/knowledge/util/PermissionUtils.kt
new file mode 100644
index 0000000..10d88b9
--- /dev/null
+++ b/src/main/kotlin/cn/edu/hfut/auto/knowledge/util/PermissionUtils.kt
@@ -0,0 +1,10 @@
+package cn.edu.hfut.auto.knowledge.util
+
+import cn.dev33.satoken.stp.StpUtil
+import cn.edu.hfut.auto.knowledge.entity.User
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.fasterxml.jackson.module.kotlin.readValue
+
+@Suppress("NOTHING_TO_INLINE")
+inline fun getLoginUser(objectMapper: ObjectMapper): User =
+    objectMapper.readValue<User>(StpUtil.getLoginId() as String)
\ No newline at end of file