行云流水

xíng yún liú shuǐ

lit. moving clouds and flowing water (idiom)

fig. very natural and flowing style of calligraphy, writing, etc; natural and unforced

行

xíng

(bound form) to walk; to go; to travel

云

yún

abbr. for Yunnan Province 雲南省|云南省[Yun2 nan2 Sheng3]

流

liú

to flow

水

shuǐ

water