五月天婷婷色综合丨蜜月va乱码一区二区三区丨337p日本欧洲亚洲大胆69影院丨国产乱码视频丨91精品国产色综合久久不卡蜜臀丨亚洲国产一区二区a毛片日本丨深夜福利视频在线丨久久久久久久久久久一区二区丨强行交换配乱婬bd丨99热热99丨国产a免费视频丨美女涩涩网站丨日韩一卡2卡3卡4卡新区亚洲丨亚洲—本道中文字幕东京热丨欧美3p激情一区二区三区猛视频丨中文字幕丰满乱子伦无码专区丨嫩草影院久久丨欧美三级理论片丨亚洲视频导航丨亚洲ww不卡免费在线

■ Before 1985 

State-owned enterprise, mainly engaged in the extraction of magnesite.

■ 1985 Oct.  –1990 May 

Began the business of calcining and processing of magnesite.

■ 1990  Jun. 

Change of legal form to private enterprise.

■ 1999  Jun. 

Change of legal form to private joint-stock enterprise. Started the production and sales of magnesium chemical products.

■ 2000  Jun. - 2005 

Change of legal form to joint-stock group, and quickening the development of operation in magnesium chemical industry.

■ 2009  

Drafting China National Standard of Magnesium Sulfate for agriculture.
May.  Holding the First International Magnesium Fertilizer Seminar.
Dec.  Foundation of Magnesium Chemical Industry Institute.

■ 2010   Apr. 

Attained the national patent for production technology.

■ 2012  Jul.   

The construction of Yingkou Magnesite Technology Holdings Co., Ltd – the subsidiary factory of Yingkou Magnesite Chemical Ind Group Co., Ltd  - further expanded the investment in magnesium chemical industry.

■ 2013 Mar. 

Attained the national patent for production technology.

■ 2014  Oct. 

“Magnesium Sulphate for Agriculture” was listed as the industrialization demonstration project by China's Ministry of Science & Technology.

■ 2015   Jun.

Obtained a new type of proprietary technology.