C1922 These Three Words Contained Millions

Chen Qiangsheng couldn't help but let out a hearty laugh.

Qin Luo didn't care about Chen Qiangsheng's wild laughter. He looked at Bai Hang.

"Professor Bai, continue..." Qin Luo said with a smile.

"Then I will embarrass myself..." Bai Hang smiled and said slowly, "The structure has always been the main factor in building a rocket