C333 To go to the mountains

This was a very troublesome problem. Thus, it wasn't easy to come up with a perfect solution in an instant.

In regards to this, Han Yichen thought about it many times and couldn't think of a solution. Finally, he shook his head and found the problem and confirmed whether the method was feasible.

A few days later, Xue Zhuanggui came over and asked: "Brother Han Yichen