LaunchCtl plist of ChinaDNS for El Capitan.

com.shadowsocks.chinadns.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>
    <key>Label</key>
    <string>com.shadowsocks.chinadns</string>
    <key>ProgramArguments</key>
    <array>
      <string>/usr/local/bin/chinadns</string>
      <string>-c</string>
      <string>/usr/local/etc/chnroute.txt</string>
    </array>
    <key>KeepAlive</key>
    <dict>
      <key>NetworkState</key>
      <true/>
    </dict>
    <key>RunAtLoad</key>
    <true/>
  </dict>
</plist>

1. Install chinadns:
   brew install chinadns-c
2. Fetch a new chnroute:
   curl 'http://ftp.apnic.net/apnic/stats/apnic/delegated-apnic-latest' | grep ipv4 | grep CN | awk -F\| '{ printf("%s/%d\n", $4, 32-log($5)/log(2)) }' > /usr/local/etc/chnroute.txt
3. Save the above plist into /Library/LaunchDaemons:
   sudo curl https://gist.githubusercontent.com/lexrus/49d9f3cd50a16b1fa9df/raw/6ee375498ec04755070df5894732e987e2e561d4/com.shadowsocks.chinadns.plist -o /Library/LaunchDaemons/com.shadowsocks.chinadns.plist
4. Launch ChinaDNS:
   sudo launchctl load /Library/LaunchDaemons/com.shadowsocks.chinadns.plist