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Chinese students take part in a graduation ceremony at Columbia University in New York last year. Guo Ke / Xinhua

Cities like Shanghai and Guangzhou have started pilot programs to issue legal work permits to address demand.

Chung Wen-hsiung, deputy general manager of 104 Job Bank, noted these people should be aware of the lack of benefits and insurance in the job since contractor drivers are not fully protected by labor laws.

Clariant, a Swiss chemicals company, is looking for Chinese partners to commercialize its "sunliquid", which converts agricultural residue such as wheat straw into ethanol. According to Markus Rarbach, head of biofuels and derivatives at Clariant, the company's technology could be in widespread use in 2018.

Chinese sci-fi hits peak after success of Three-Body trilogy