The rocket was the largest Chinese rocket ever launched into space

 

As of my knowledge cutoff in 2021, the largest Chinese rocket launched into space was the Long March 5B, which was launched in May 2020. The Long March 5B rocket was approximately 53 meters (174 feet) tall and had a diameter of 5 meters (16 feet). It was capable of carrying a payload of up to 22 tons into low Earth orbit.

The Long March 5B rocket was primarily designed to launch modules for China's space station into orbit, as part of the country's ambitious space program. While the rocket successfully launched its payload into orbit, there was some concern about the uncontrolled reentry of the rocket's core stage, which eventually crashed into the Indian Ocean in May 2021.

It's worth noting that China has continued to develop and launch new rockets and spacecraft since the Long March 5B, and it's possible that they have launched larger rockets since then or may do so in the future.