At 15:37 on October 31st, the Long March 5B carrier rocket ignited and took off at the Wenchang Space Launch Site with the Mengtian experimental cabin of the space station. my country's strongest rocket so far launched the heaviest and largest spacecraft into the sky The experimental module entered orbit accurately, and the launch mission was a complete success. The successful launch of the Mengtian experimental module marks the completion of the third step of "building a space station and solving large-scale, long-term care of space applications". The capsules and rockets launched this time were all developed by China Airlines. This is the 446th launch of the Long March series of carrier rockets.