Sanming TonghuiVol. 1, On the Nature and Fortune of the Sixty Jiazi (verdicts & remarks)
Geng Chen Metal is tin and solder, favoring autumn and slight Wood. Associated with Canopy, Great Defeat, Cudgel, and Flat Head. Geng Chen is Metal of gathered qi.
It does not require Fire's control, its vessel forming naturally; an excess of Fire destroys its vessel, whereas sick and severed Fire causes no harm.
If meeting Jia Chen or Yi Si Fire, the malice is unspeakable; nor can it overcome masses of Wood, because its own qi is also concentrated.
Yan Dongshou said: 'Geng Chen Metal possesses the virtues of unyielding strength and deep solidity, endowed with an intelligent and unblocked nature. In spring and summer, fortune and misfortune lurk in balance; in autumn and winter, elegance and fullness are fulfilled.
Entering proper structures, it commands both civil and military talents; carrying Sha stars, it delights in wielding martial power.'