Montesquieu

But it is in China that the man­ners are indes­truc­ti­ble. Besides the fact that the women there are com­ple­tely sepa­ra­ted from the men, man­ners as well as ethos are taught in the schools. An edu­ca­ted man can be reco­gni­zed by the gra­cious way he bows.1 These things first given as pre­cepts, and by grave scho­lars, become fixed as moral prin­ci­ples and never change.

Says Father du Halde.