Yang Pengpeng and Wang Shulin show their perfect delivery record with no negative comments from customers in Weifang, East China's Shandong province, on Sept 6, 2018. [Photo/IC]

Yang Pengpeng, a delivery guy with hearing and speech impairment, talks to his friends via smartphone in Weifang, East China's Shandong province, on Sept 5, 2018. [Photo/IC]

Wang Shulin video chats with his wife during the break in Weifang, East China's Shandong province, on Sept 5, 2018. [Photo/IC]