After Old Master Q entered mainland China, Wong Chak stirred up a dispute over plagiarism in Chinese cultural circles, given the similarities in name, style and character with early mainland Chinese cartoonist Peng Di's series Old Master Q.
王澤的老夫子紅進大陸後，由於它的名字、造型與個性，和早年大陸漫畫家朋弟的「老夫子」相當雷同，一度引來大陸文化界的「抄襲」之議。