"In 1727 the to-min or 'idle people' of Cheh Kiang province (a Ningpo name still existing), the yoh-hu or 'music people' of Shanxi province, the si-min or 'small people' of Kiang Su (Jiangsu) province, and the Tanka people or 'egg-people' of Canton (to this day the boat population there), were all freed from their social disabilities, and allowed to count as free men." "Cheh Kiang" is another romanization for Zhejiang. The Duomin (Chinese: 惰民; pinyin: duò mín; Wade–Giles: to-min) are a caste of outcasts in this province.
What does 'si-min' mean? (If the question is unanswerable, say "unanswerable")
small people