On Friday, when COMAC's C919, China's first homebuilt passenger plane, took off from, and then landed safely at, Shanghai Pudong International Airport, it not only completed its first test flight successfully but marked a major milestone for the Shanghai-based Baosteel Special Steel Co Ltd.

For, the C919 used landing gear made by Baosteel Special Steel, also known as Baosteel, which is now the first Chinese supplier of such hardware for passenger jets.

"It is the first time that the 300M steel researched and produced by the company is used in the production of landing gear in China and it shows we have made a breakthrough in this sector," said Zhao Suwu, a senior engineer from Baosteel Special Steel.