金光明經文句記 4.93

4.93

二、「亦名」下，示二異名。行行者，慧行之上加修事行，故名行行。助道者，以不淨想破事中貪，資於正觀破障理惑，故名助道。

Second, below the words "also called," showing the two alternative names. "Practice of practice" (xingxing) means adding phenomenal practice on top of wisdom practice; hence it is called "practice of practice." "Auxiliary paths" means using the contemplation of impurity to break phenomenal greed and support the correct contemplation in breaking the delusions that obstruct the principle; hence they are called "auxiliary paths."