Li Wei, director of the Science and Technology Department of the central bank, said at the 2nd China International Import Expo that the development of financial technology must adhere to the principle of safety and maximize the advantages of different technologies. Li Wei pointed out that artificial intelligence, big data, and blockchain technologies are not omnipotent. They have strengths and weaknesses at the technical level. Relevant institutions must carefully analyze and find suitable application scenarios. Regarding the blockchain technology, he said that the blockchain has the advantage of not being able to falsify the forgery, but the security of the blockchain needs to be studied.