diff --git a/src/rules/special/original/gongzicp.ts b/src/rules/special/original/gongzicp.ts
index d585f99c..c7954818 100644
--- a/src/rules/special/original/gongzicp.ts
+++ b/src/rules/special/original/gongzicp.ts
@@ -613,7 +613,7 @@ export class Gongzicp extends BaseRuleClass {
             })
             .join("\n");
 
-          if (chapterInfo.postscript.length === 0) {
+          if (chapterInfo.postscript === null || chapterInfo.postscript.length === 0) {
             contentHTML = _contentHTML;
           } else {
             contentHTML = document.createElement("div");