diff --git a/app/src/main/java/li/songe/gkd/data/NodeInfo.kt b/app/src/main/java/li/songe/gkd/data/NodeInfo.kt
index 8f18063..9113af6 100644
--- a/app/src/main/java/li/songe/gkd/data/NodeInfo.kt
+++ b/app/src/main/java/li/songe/gkd/data/NodeInfo.kt
@@ -32,7 +32,7 @@ data class NodeInfo(
             quickFind: Boolean?,
         ): Boolean? {
             // 如果父节点是无法查找的, 则所有子节点都是无法查找的
-            // 如果一个节点是可查找的, 则所有兄弟节点都是可查找的(如果满足条件)
+            // 如果一个节点是可查找的, 则所有兄弟节点及其祖先节点都是可查找的(如果满足条件)
             return if (nodeInfo != null) {
                 val viewId = nodeInfo.viewIdResourceName
                 if (viewId != null && viewId.isNotEmpty()) { // id='' 不满足查找
diff --git a/app/src/main/java/li/songe/gkd/debug/SnapshotExt.kt b/app/src/main/java/li/songe/gkd/debug/SnapshotExt.kt
index 6ada029..2dfe4c8 100644
--- a/app/src/main/java/li/songe/gkd/debug/SnapshotExt.kt
+++ b/app/src/main/java/li/songe/gkd/debug/SnapshotExt.kt
@@ -112,7 +112,7 @@ object SnapshotExt {
                 val stream = File(getScreenshotPath(snapshot.id)).outputStream()
                 bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream)
                 stream.close()
-                val text = Singleton.json.encodeToString(snapshot)
+                val text = Singleton.keepNullJson.encodeToString(snapshot)
                 File(getSnapshotPath(snapshot.id)).writeText(text)
                 DbSet.snapshotDao.insert(snapshot.toSnapshot())
             }
diff --git a/app/src/main/java/li/songe/gkd/util/Singleton.kt b/app/src/main/java/li/songe/gkd/util/Singleton.kt
index 71dfcef..655caad 100644
--- a/app/src/main/java/li/songe/gkd/util/Singleton.kt
+++ b/app/src/main/java/li/songe/gkd/util/Singleton.kt
@@ -20,6 +20,14 @@ object Singleton {
         }
     }
 
+    val keepNullJson by lazy {
+        Json {
+            isLenient = true
+            ignoreUnknownKeys = true
+            encodeDefaults = true
+        }
+    }
+
     val client by lazy {
         HttpClient(OkHttp) {
             install(ContentNegotiation) {