Jiaotu

Jiaotu's image is carved onto door knockers and door-grip plates (铺首, pushou) — the ornamental metal fittings found on the doors of traditional Chinese homes, palaces, and temples. His shell-like face stares outward from the door, with a ring hanging from his mouth that serves as the knocker.

The placement is precise: Jiaotu sits exactly at the threshold, the boundary between inside and outside, private and public. His presence there was believed to seal the door against intruders, evil spirits, and misfortune — anything unwelcome that tried to cross into the home would be stopped by the dragon son who loved nothing more than to close.

Jiaotu symbolizes the protection of the home, the sanctity of privacy, and the security of the threshold. In Chinese culture, the door is the most important boundary in a dwelling — the point where the family meets the outside world — and placing Jiaotu there asserted that the home was guarded by a divine being who would never let harm enter.

His shell-bound form also carries a quieter meaning: the value of retreat and self-protection. Not every dragon son seeks battle or display; some, like Jiaotu, find strength in closing the door and guarding what is within. In a culture that valued both hospitality and the safety of the family, Jiaotu stood for the latter — the right to shut the world out when one needed peace.

Jiaotu is counted among the Dragon's sons in several versions of the Nine Sons of the Dragon (龙生九子) legend. While the core nine are often listed as Qiuniu, Yazi, Chaofeng, Pulao, Suanni, Bixi, Bi'an, Fuxi, and Chiwen, later sources — including the Ming dynasty scholar Yang Shen — added Jiaotu and others to reflect the wider tradition.

The proverb 'the dragon has nine sons, and each is different' (龙生九子，各有不同) captures the spirit of the legend: the dragon's offspring are so varied that no two share a form or a passion. Jiaotu, with his shell and his love of closing, is among the most distinctive — a dragon son whose power lies not in opening but in shutting.