What are the reform methods?

I don't know what kind of reform you are talking about, but I think you are asking about political and social system reform by default!

According to historical records, reforms are usually divided into two types. One is gradual reform, such as Sweden and Switzerland, which have made a peaceful transition from the traditional bourgeois exploitation structure to today's democratic socialist structure. The second is the violent revolution. For example, the * * * production party in China overthrew the former Kuomintang regime, and all social and administrative systems were completely changed. As for whether it is good or bad, it can only be judged by future generations!