There are two necessary processes to lay a good foundation of mathematics: first, learning and accepting "from thin to thick"; Re-digest and refine "from coarse to fine"-China
Try hard before you know wisdom. Diligence is a good training, and a little effort is a little talent-Hua.
Dare to do subtraction in learning, that is, subtract what the predecessors have solved, and see what problems have not been solved, which need us to explore and solve-Hua.
The universe is big, the particles are tiny, the speed of rockets, the cleverness of chemical engineering, the change of the earth, the mystery of biology, the complexity of daily use, and mathematics is everywhere-China.