https://blog.wongcw.com/2018/12/14/%e6%95%b0%e6%8d%ae%e5%ba%93%e5%af%bc%e5%85%a5%e9%98%bf%e9%87%8c%e4%ba%91%e8%99%9a%e6%8b%9f%e4%b8%bb%e6%9c%ba%e5%87%ba%e7%8e%b0%e9%94%99%e8%af%af%ef%bc%9a-40101-set-names-utf8mb4-unknown-character/