C1695 Depth

After a while, Sun Dongkai said, "Little Tian, I still feel that part four is lacking something."

"Oh …" Tian Shan Shan looked back at Sun Dong Kai.

"It seems to lack depth, so it's a bit superficial. The main issue is the depth of our understanding, don't you think?" Sun Dongkai's tone was gentle.

Tian Shan Shan looked thoughtful. "Alright, I'll think about it a little more