7 working days. It takes 3 working days for files to be mailed to the city through confidential channels; 7 working days in the province; It takes 30 working days to cross provinces. Xihua university is located in Handu District, Chengdu, and it takes 7 working days to send files to Yibin Talent Network. Archives refer to various forms of original records with preservation value directly formed by people in various social activities. The original record is its essential attribute.