The side is smooth
Chinese idiom, Pinyin is p á NGT à ngq à ch à ng, which means universal access. It's from Zheng Guanying's dangerous words in the flourishing age: training customs.
The origin of Idioms
Zheng Guanying's dangerous words in prosperous times: admonishment of Customs: "what he said is mainly based on the holy edicts, but based on the way of Confucius and Mencius and the learning of Cheng and Zhu, in order to be appropriate to the people's heart."
The side is smooth
severity in speech and fairness in principle -- as the utterance of an upright person - cí yán yì zhèng
Looking at the shadow and speculating - wàng yǐng chuāi qíng
be honored with high official titles - gāo guān xiǎn jué
an official according to his talents - yīn rèn shòu guān
A donkey's lips are not the same as a horse's - lǘ chún bù duì mǎ zuǐ
The swallows dance and the warblers sing - yàn wǔ yīng tí