Combo photo shows Zhai Liuwei posing for a photo at a company's annual summary meeting in 2003 (up) and Zhai posing for a photo at his own company on Aug. 15, 2020 (bottom, photo taken by Zhao Ruixi) in Shenzhen, south China's Guangdong Province. Zhai came from Suzhou City of Anhui Province and worked in a medical facility company in Shenzhen after graduation in 1999. Zhai started his own business twice, in 2006 and 2013. "In Shenzhen, as long as you do your best, people will help when you have difficulties," said Zhai. When China established the Shenzhen Special Economic Zone in 1980, its population was less than 30,000. Forty years later, it has developed into the biggest immigrant city in China housing 13 million with its GDP hitting 2.69 trillion yuan (about 389.4 billion U.S. dollars). (Xinhua)