What are the most valuable listed companies?

1 First of all, what is "investment value"? Connotation and extension of investment value. There is too much content to say clearly in a few words.

2. What are the most valuable listed companies? For any company, the investment value is constantly changing with the change of the market; Also with the company's operating conditions constantly changing; At the same time, due to the different personal experience, knowledge and way of thinking, there will be a variety of judgment choices. So it is difficult to give a specific answer here.

3. Please learn the value investment theory systematically-it is better to quit the net than to be a fish.