保甲

1. • historical communal administrative and self-defence system created during the Song Dynasty and revived during the Republican Era, in which households are grouped in jia 甲 jiǎ and jia are grouped in bao 保 bǎo

Character by character

• 保(bǎo)defend
• 甲(jiǎ)first of the ten Heavenly Stems 十天干 shítiāngān