Side tongquyu
The Chinese idiom, Pinyin is p á NGT ō ngq ǔ ch à ng, which means universal access; the same as "pun Tong Qu Chang". From the preface to Tianyuan arithmetic.
The origin of Idioms
In Feng Guifen's preface to Tianyuan arithmetic in Qing Dynasty, it is said that "the source of both sides can be found, while the source of others can be found."
Side tongquyu
birds of a feather flock together - tóng lèi xiāng cóng
perpetrate whatever evils one pleases - zì yì wàng xíng
steal a little leisure from the rush of business - máng lǐ tōu xián