In January 2013, China State Grid announced the bidding result of Haminan¡ªZhengzhou ¡À800kV EHV DC transmission line project. Glass insulators of SYGG has won the bidding which including ninety eight thousand pieces and the amount is about thirty seven million Yuan. It showed SYGG has become China Quality Supplier of EHV project of State Grid.
Haminan¡ªZhengzhou ¡À800kV EHV DC transmission line project which starts from Haminan of Hami convertor station(Fenghuotai station)in west China to Zhongmou ,Henan Province(Dameng station)in east China. The total length is 2208.2km, transmission capacity is 8000MW. Haminan¡ªZhengzhou line is the first EHV DC line of ¡°Jiangdianwaisong¡±. It is the milestone in history and laid a solid foundation for enlarging EHV project continuously.