There are too many training institutions in Hangzhou, reliable is certainly there, not reliable, the majority of the establishment in recent years is not recommended to go. Big data is difficult, self-study is unlikely, if you really want to learn big data, it is recommended to apply for a class, big data in the last two years the market is quite good, the starting salary can reach 8-12k, the development of space is also very good, Hangzhou, big data shortage of talent, the future treatment of the growth of work experience and technology is certainly better and better. I hope to be able to help you.