https://codeantenna.com/a/CFr6RnHdQr
https://dreamerjonson.com/2018/11/20/solidity-25-thansfer2/index.html
https://learnblockchain.cn/article/2191
https://blog.csdn.net/m0_37714470/article/details/119113895
https://robinchen95.com/documents/Refer/36-智能合约安全综述.pdf
https://github.com/maxwoe/solidity_patterns.git
https://github.com/NoharaHiroshi/upgradability-solidity-demo.git