倒戈卸甲

dǎo gē xiè jiǎ

to lay down arms

倒

dǎo

to fall; to collapse; to lie horizontally

戈

gē

dagger-axe

卸

xiè

to unload

甲

jiǎ

first of the ten Heavenly Stems 十天干[shi2 tian1 gan1]