In 2018, Luming Duan, China's top scientist, has become a professor at a famous university, gaining both fame and fortune. However, at this moment, he received a phone call from his motherland. A few words on the phone made him make up his mind and resolutely decided to give up everything return to China, and start over. So, what call did Luming Duan receive, and why did he return to China without hesitation? OK, let's move on to today’s topic.