diff --git a/preface.asciidoc b/preface.asciidoc
index d14ddba7..7ed20a8e 100644
--- a/preface.asciidoc
+++ b/preface.asciidoc
@@ -265,4 +265,5 @@ Following is a list of notable GitHub contributors, including their GitHub ID in
 * Wojciech Langiewicz (wlk)
 * Yancy Ribbens (yancyribbens)
 * Yoshimasa Tanabe (emag)
-* yurigeorgiev4((("", startref="acknowledge0")))
+* yurigeorgiev4
+* Zheng Jia (zhengjia)((("", startref="acknowledge0")))