As of August, the State Grid Corporation headquarters has issued 8 batches of bid-winning announcements concerning composite insulator products, namely:

  1. State Grid Corporation of China announced that it won the first bidding and procurement of line materials for the Baihetan~Jiangsu UHV project in 2021;
  2. The ninth batch of procurement of UHV projects by State Grid Corporation of China in 2021 (Jingmen-Wuhan, Nanchang-Changsha and other line materials bidding procurement) won the bid announcement;
  3. Announcement on the winning bid of the fourth batch of procurement by State Grid Corporation of China in 2021 (the first tender procurement of line installation materials for power transmission and transformation projects);
  4. The eighteenth batch of procurement by the State Grid Corporation of China in 2021 (the second tender procurement of line installation materials for power transmission and transformation projects) has won the bid announcement;
  5. The twentieth batch of purchases by the State Grid Corporation of China in 2021 (the first 35-330 kV material agreement inventory bidding for power transmission and transformation projects) has won the bid announcement;
  6. State Grid Corporation of America's 2021 UHV project's 22nd batch of procurement (Nanyang Jingmen Changsha second material bidding procurement) won the bid announcement;
  7. Announcement on the winning bid of the 31st batch of procurement of the State Grid Corporation of China in 2021 (the third tender procurement of line installation materials for power transmission and transformation projects);
  8. State Grid Corporation of China announced that it won the bid for the twelfth batch of procurement of UHV projects in 2021 (Baihetan-Jiangsu Third Material Bidding Procurement).

The main bidding-winners for composite insulators are: