寻找真正的痛点，有时候人人吐槽的，并不一定是真正的想要有所改变
You are looking for painful problems, and you want to solve the most painful of them all. You also need to validate that this is an actual problem that people need to have addressed. Sometimes, we just want to complain, but we don’t want to change our ways. You will need to find a problem so painful that we just have to deal with it.