天衣無縫(tiān yī wú fèng)

Heavenly Robe Is Seamless
Used to describe an essay or speech which is flawless or perfectly convincing.

According to legend, there was a man by the name of Guo Han. One mid-summer evening, he was relaxing in the cool when, all of a sudden, he saw a maid descending from the sky. She introduced herself as the fairy Girl weaver in heaven. Noticing that her robe was seamless, he ventured to aky why. “We in heaven make garments without using needles or thread. They are naturally without seams.”