What are the leading transformer oil manufacturers in China?

The leading transformer oil manufacturers in China include Sinopec, PetroChina, and CNOOC. These companies dominate the market due to their extensive production capabilities and established distribution networks. Sinopec, in particular, is known for its high-quality mineral and synthetic transformer oils, which are essential for ensuring the efficient operation and longevity of power transformers. Their products meet international standards, making them competitive in both domestic and global markets.