Read the following chronology of events about Zhenjiang Hengshun vinegar industry and answer the questions: In 184, Zhu Zhaohuai, a native of Xibiao Village, Jianbi Town, Jingkou (formerly known as Zhenjiang), was outside Zhenjiang. (1) according to the historical period: 184-191, Qing dynasty; 1926-1949. Republic of China; Since 1949, the Chinese people * * * and the Republic of China.

according to the nature of the enterprise: from 184 to 1935, it was privately owned; 1935-1955, shareholding system; 1955-1966, public-private partnership; 1966-1999, state-owned; 1999-21, joint-stock system; Since 21, listed companies.

according to the mode of production: 184-1988, manual workshop production; From 1989 to now, modern large-scale industrial production.

(2) "omitted" (as long as it makes sense).