diff --git a/src/main/kotlin/cn/edu/hfut/auto/knowledge/config/SerializeConfig.kt b/src/main/kotlin/cn/edu/hfut/auto/knowledge/config/SerializeConfig.kt
new file mode 100644
index 0000000..e4629ae
--- /dev/null
+++ b/src/main/kotlin/cn/edu/hfut/auto/knowledge/config/SerializeConfig.kt
@@ -0,0 +1,19 @@
+package cn.edu.hfut.auto.knowledge.config
+
+import org.springframework.context.annotation.Configuration
+import org.springframework.core.convert.converter.Converter
+import org.springframework.stereotype.Component
+import java.util.*
+
+@Configuration
+class SerializeConfig {
+    @Component
+    class NullableUUIDConverter : Converter<String, UUID?> {
+        override fun convert(source: String): UUID? {
+            if (source.isEmpty() || source.equals("null", true)) {
+                return null
+            }
+            return UUID.fromString(source)
+        }
+    }
+}
\ No newline at end of file
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 1b7055d..10f2500 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
@@ -2,6 +2,7 @@ package cn.edu.hfut.auto.knowledge.controller
 
 import cn.dev33.satoken.annotation.SaCheckRole
 import cn.edu.hfut.auto.knowledge.entity.Knowledge
+import cn.edu.hfut.auto.knowledge.entity.KnowledgeDraft
 import cn.edu.hfut.auto.knowledge.entity.KnowledgeFileAttribute
 import cn.edu.hfut.auto.knowledge.entity.by
 import cn.edu.hfut.auto.knowledge.entity.rpc.FileTicket
@@ -36,8 +37,16 @@ class KnowledgeController(
 ) {
 
     @GetMapping("/{knowledgeId}")
-    suspend fun getKnowledgeBrief(@PathVariable knowledgeId: UUID): Knowledge =
-        knowledgeRepository.findNullable(knowledgeId, Knowledge.AS_PARENT_FETCHER) ?: throw BusinessError(ErrorCode.RESOURCE_NOT_FOUND)
+    suspend fun getKnowledgeBrief(@PathVariable knowledgeId: UUID?): Knowledge {
+        if (knowledgeId == null) {
+            return new(Knowledge::class).by {
+                @Suppress("UNCHECKED_CAST")
+                children()
+                    .addAll(knowledgeRepository.findAllByParentId(null, Knowledge.BRIEF_FETCHER) as List<KnowledgeDraft>)
+            }
+        }
+        return knowledgeRepository.findNullable(knowledgeId, Knowledge.AS_PARENT_FETCHER) ?: throw BusinessError(ErrorCode.RESOURCE_NOT_FOUND)
+    }
 
     @SaCheckRole("1")
     @Transactional(rollbackFor = [Throwable::class])
@@ -66,7 +75,7 @@ class KnowledgeController(
                 id = knowledgeResult.id
             }
         })
-        FileTicket(fileResult).run {
+        FileTicket(fileResult, vo.md5).run {
             try {
                 kafkaTemplate.send(UPLOAD_FILE_TOPIC, this).await()
             } catch (e: KafkaException) {
diff --git a/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/rpc/FileTicket.kt b/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/rpc/FileTicket.kt
index c3f96a2..882bbe3 100644
--- a/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/rpc/FileTicket.kt
+++ b/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/rpc/FileTicket.kt
@@ -7,9 +7,11 @@ import java.util.UUID
 
 data class FileTicket(
     val ticket: String,
-    val id: UUID
+    val id: UUID,
+    val md5: String,
+    val size: Long
 ) {
-    constructor(knowledgeFileAttribute: KnowledgeFileAttribute): this(
+    constructor(knowledgeFileAttribute: KnowledgeFileAttribute, md5: String): this(
         buildString {
             knowledgeFileAttribute.run {
                 append(id)
@@ -19,6 +21,8 @@ data class FileTicket(
         }.let {
               Sha2Crypt.sha256Crypt(it.toByteArray())
         },
-        knowledgeFileAttribute.id
+        knowledgeFileAttribute.id,
+        md5,
+        knowledgeFileAttribute.size
     )
 }
diff --git a/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/vo/KnowledgeVO.kt b/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/vo/KnowledgeVO.kt
index b83283c..c630509 100644
--- a/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/vo/KnowledgeVO.kt
+++ b/src/main/kotlin/cn/edu/hfut/auto/knowledge/entity/vo/KnowledgeVO.kt
@@ -6,7 +6,7 @@ data class KnowledgeFileUploadVO(
     val name: String,
     val brief: String,
     val size: Long,
-    val sha256: String,
+    val md5: String,
     val tags: List<Long>,
     val parentId: UUID?
 )
\ No newline at end of file
diff --git a/src/main/kotlin/cn/edu/hfut/auto/knowledge/repository/KnowledgeRepository.kt b/src/main/kotlin/cn/edu/hfut/auto/knowledge/repository/KnowledgeRepository.kt
index 1c1b9ee..8ffb7ac 100644
--- a/src/main/kotlin/cn/edu/hfut/auto/knowledge/repository/KnowledgeRepository.kt
+++ b/src/main/kotlin/cn/edu/hfut/auto/knowledge/repository/KnowledgeRepository.kt
@@ -7,4 +7,6 @@ import java.util.*
 
 interface KnowledgeRepository : KRepository<Knowledge, UUID> {
     fun findByNameAndParentId(name: String, parentId: UUID?, fetcher: Fetcher<Knowledge>? = null): Knowledge?
+
+    fun findAllByParentId(parentId: UUID?, fetcher: Fetcher<Knowledge>? = null): List<Knowledge>
 }
\ No newline at end of file