HSK 5
完善
wánshàn形动
(of systems, facilities etc) comprehensive; well-developed; excellent; to refine
我们还要继续完善服务。
Wǒ men hái yào jì xù wán shàn fú wù.
We still need to keep improving the service.
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New in the HSK 3.0 word list at level 5.