In short, when we buy commercial medical insurance, we should try to choose insurance products with shorter waiting period, especially we should not be greedy and repeat insurance, so that we will not get more compensation, but also spend more money and waste. When we take out insurance, we can get a good guarantee as long as we choose the appropriate amount and content according to our own situation.
Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.