流程
app → sing-box → charles → sing-box 
charles 设置
[图片] 
external proxy settings socks5://127.0.0.1:2334 
proxy settings socks5://127.0.0.1:8889 
sing-box 设置
{
  "log": {
    "level": "warn"
  },
  "dns": {
    "servers": [
      {
        "tag": "ali",
        "address": "223.5.5.5",
        "detour": "direct-out"
      }
    ],
    "rules": [
      {
        "outbound": "any",
        "server": ...