7 to 10 working days. According to the query of official website, State Taxation Administration of The People's Republic of China, People's Republic of China (PRC), it takes 7 to 10 working days to complete the tax refund after Shenzhen submits the tax refund application and enters the national treasury for processing. Shenzhen, referred to as Pengcheng for short, is a prefecture-level city under the jurisdiction of Guangdong Province, a city with separate plans, a mega-city and a special economic zone approved by the State Council.