Models present creations of sweater during the China International Fashion Fair 2018 in Shanghai, East China, March 15, 2018. Over 50 sweater companies from Puyuan township of Tongxiang city, East China's Zhejiang province, brought their creations to the fashion show in Shanghai. Puyuan is known as a major sweater production base in China. [Photo/Xinhua]

A model presents creations of sweater during the China International Fashion Fair 2018 in Shanghai, East China, March 15, 2018. Over 50 sweater companies from Puyuan township of Tongxiang city, East China's Zhejiang province, brought their creations to the fashion show in Shanghai. Puyuan is known as a major sweater production base in China. [Photo/Xinhua]

A models presents creations of sweater during the China International Fashion Fair 2018 in Shanghai, East China, March 15, 2018. Over 50 sweater companies from Puyuan township of Tongxiang city, East China's Zhejiang province, brought their creations to the fashion show in Shanghai. Puyuan is known as a major sweater production base in China. [Photo/Xinhua]