Our 班长 had invited a Lecturer to give a talk to our Lamrim Class.
The Lecturer opened the talk with a snippet on how Venerable Ru Jun had visited Singapore and given a discourse on 文殊三教授 - a teaching that is able to assist in the practice of 空性.
She related that the components of 文殊三教授 are:
1 多祈求本尊师长
2 多门净罪集资
3 研阅无垢经论
I googled and found relevant text here:
https://gebisedu.org/gead-lamrim/class-summary/20180629classum/
以文殊三教授，深學廣學：
廣論可廣、可深、可淺，看你願不願意跨進去。如果我們有意願深學、廣學的話，就要善用課餘時間，廣泛研閱無垢經論。但要能真正的深學、廣學，還要努力積資淨障，殷重祈求上師三寶的加持。祈禱上師本尊、多門集資淨罪、研閱無垢經論，其實這就是文殊三教授。
It is the first time I have heard of 文殊三教授.
Contributing to this forum to see if any of us has anything to add.
