diff --git a/zotero-styles/chinese-gbt7714-2015-numeric-etal.csl b/zotero-styles/chinese-gbt7714-2015-numeric-etal.csl
index bc58c11bff1e168a7ee0f63b01f11b1607eaa0dc..5b88942e86dc476b5935878bd67c189cd623896c 100644
--- a/zotero-styles/chinese-gbt7714-2015-numeric-etal.csl
+++ b/zotero-styles/chinese-gbt7714-2015-numeric-etal.csl
@@ -430,7 +430,7 @@
     </choose>
   </macro>
   <citation collapse="citation-number" after-collapse-delimiter=",">
-    <layout vertical-align="sup" delimiter="," prefix="[" suffix="]">
+    <layout vertical-align="sub" delimiter="," prefix="[" suffix="]">
       <text macro="citation-layout"/>
     </layout>
   </citation>