Real estate policy is like judging competition. A small rule change and a penalty will change tactics and situation. Real estate is greatly influenced by policies. For example, when Hangzhou first started to implement the public lottery measures, it needed certain asset certificates, which led to a person being able to lottery in several properties at the same time; Now that the asset certificate has become a frozen fund, there will be no more simultaneous lottery. This is the impact of policy on real estate, which seems dull but has far-reaching significance. Policies cannot take care of everyone, which also means that our concepts and ways of thinking should be flexible and able to accept changes at any time.