Ekisei Tsubiho (奕正通微補) is a revised & expanded version of the original Yizheng (= Jp. Ekisei) that was written by Yong Haoru aka Yong Xishi (= Jp. Ko Kisei). It was revised by Chen Jiru, and expanded by Saito Masatsugu.
There is a digitized version of all three volumes at the Waseda University http://www.wul.waseda.ac.jp/kotenseki/html/wo09/wo09_03702/index.html.