贾 ㄐㄧㄚ ˇ jiǎ 思 ㄙ sī 勰 ㄒㄧㄝ ˊ xié 賈 ㄐㄧㄚ ˇ jiǎ 思 ㄙ sī 勰 ㄒㄧㄝ ˊ xié Jia Sixie, sixth century writer and author of agricultural encyclopedia Essential skill to benefit the people 齊民要術|齐民要术[Qi2 min2 Yao4 shu4]