Recently, CSDN released the annual report of Chinese developers. The report mentioned that blockchain technology has been a hot topic in the past two years. Among them, 1.22% of developers are using or preparing to use blockchain technology to solve technical problems. 2. 43% of the respondents are engaged in the development of public blockchains (Bitcoin, Ethereum, etc.). At present, the industry focuses on the development direction of solutions, public chains and alliance chains. 3. Bitcoin and Ethereum are currently two mainstream blockchain development platforms. This year's data shows that Ethereum decreased from 44% in 2018 to 24%; Bitcoin increased from 28% in 2018 to 35%, accounting for the first. 4. In the application of the blockchain industry, the financial industry is generally regarded as the industry application direction, accounting for 36%.