China drills https://koputokiryo.com/%e3%80%90%e8%8b%b1%e5%ad%97%e6%96%b0%e8%81%9e%e3%82%92%e8%aa%ad%e3%82%80%e3%80%91%e4%b8%ad%e5%9b%bd%e3%81%af%e3%82%a2%e3%83%a1%e3%83%aa%e3%82%ab%e3%81%a8%e3%81%ae%e4%ba%a4%e6%b8%89%e3%82%92%e6%a3%9a/china-drills/