The coal-mining industry was developing rapidly during the 1970s and 1980s.by the year of 1991,the total coal output of Jixi ranked 2nd in Chinese Mainland.
By 1991, the total coal output of Jixi ranked 2nd in the Chinese Mainland. The coal-mining industry was developing rapidly during the 1970s and 1980s.
The coal-mining industry was developing rapidly during the 1970s and 1980s. By 1991, the total coal output of Jixi ranked 2nd in the Chinese Mainland.
The coal-mining industry was developing rapidly during the 1970s and 1980s. By 1991, the total coal output of Jixi ranked 2nd in the Chinese Mainland.