first of the ten Heavenly Stems 十天干[shi2 tian1 gan1], (used for an unspecified person or thing), first (in a list, as a party to a contract etc), letter "A" or roman "I" in list "A, B, C", or "I, II, III" etc, armor plating, shell or carapace, (of the fingers or toes) nail, bladed leather or metal armor (old), ranking system used in the Imperial examinations (old), civil administration unit in the baojia 保甲[bao3 jia3] system (old), ancient Chinese compass point: 75°
second of the ten Heavenly Stems 十天干[shi2 tian1 gan1], second in order, letter "B" or Roman "II" in list "A, B, C", or "I, II, III" etc, second party (in legal contract, usually 乙方[yi3 fang1], as opposed to 甲方[jia3 fang1]), ethyl, bent, winding, radical in Chinese characters (Kangxi radical 5), ancient Chinese compass point: 105°