十全十美
shí quán shí měi
complete and beautiful; perfect in every way; to be perfect
E.g.:
「這局棋後，AlphaGo在我眼裡十全十美，對我來說，它就是圍棋上帝，」他在週四的比賽之後說。
“After this time, AlphaGo to me is 100 percent perfection, to me AlphaGo is the god of the Go game,” he said after the game on Thursday.
(Source: https://cn.nytimes.com/china/20170526/google-beats-ke-in-go/zh-hant/dual/)
E.g.:
該報援引工程項目總設計師周建平的話說，「『十』在中國具有特殊的意義，我們有信心期待神十任務『十全十美』！」
It cited the chief designer on the engineering project, Zhou Jianping, as saying: “In China, 10 has a special meaning. We are confidently expecting that the Shenzhou 10 will complete its tasks ‘10 whole 10 beautiful!’” slang for “flawlessly.”
(Source: https://cn.nytimes.com/china/20130613/c13space/zh-hant/dual/)