1. Blockchain theory: Blockchain developers should be familiar with the theoretical knowledge of blockchain, which is the most basic requirement for a blockchain developer. The content inside includes blockchain network architecture, decentralization and other related application technologies. Expanding technical theory is the mastery of the development of Ethereum.

2. Smart contract: A smart contract is a trust mechanism that requires blockchain developers to write a series of codes in blockchain programming language and develop logic according to different scenarios, aiming at eliminating the involvement of third parties and creating an efficient and highly trusted blockchain network. Blockchain developers want to realize the automatic execution of this string of codes, and it is an irreversible operation effect.

Third, cryptography: Many blockchain application scenarios are highly encrypted, and the point-to-point encryption mode is the characteristic of cryptography. Blockchain developers have learned about encryption concepts such as wallet, key, and extensive encryption and decryption technologies by studying cryptography

4. Distributed architecture: Blockchain developers must understand distributed architecture and network functions. Decentralized network is the foundation of blockchain architecture, and the information transmission in blockchain network should follow the decentralized way, so that everyone can enjoy the same network rights and interests.