It means that we should take our own experience as the root and the knowledge generated by this experience as the branch, and then the knowledge of others can be connected and the knowledge of others can become an organic part of our knowledge.

3. Tao Xingzhi has been engaged in civilian education all his life, and put forward the slogan of "teaching others to teach themselves, wasting people and money", and really practiced it, sharing weal and woe with poor students.