(1) According to historical period: 1840- 19 10, Qing Dynasty; 1926- 1949. Republic of China; From 65438 to 0949, the people of China and the Republic of China.

According to the nature of the enterprise: 1840- 1935, private; 1935- 1955, stock system; 1955- 1966, public-private partnership; 1966- 1999, state-owned; 1999-200 1 year, shareholding system; Since 200 1, listed companies.

According to the production mode: 1840- 1988, it is produced by hand workshop; Since 1989, modern large-scale industrial production.

2 "slightly" (reasonable).