The four guardian animals symbolizing the four quadrants of the sky, the four seasons, and the four directions; specifically 青龙 qīng​lóng, 白虎 bái​hǔ, 朱雀 zhū​què, and 玄武 xuán​wǔ

The gods of the four seas: Zhūróng (South), Xuánmíng (North), Gōumáng (East), and Rùshōu (West).

A mix of four traditional Chinese medicinal herbs—Chinese yam, gorgon fruit, lotus seeds, and Poria cocos—often stewed with pork intestine or pearl barley as a restorative soup.