5-7 days. I Futian's latest convenience service function is divided into four modules: white list application, visitor access, visitor reservation and abnormal complaint. Whitelist application can be completed within 5-7 days. Futian District Taxation Bureau's "White List of Invoice Approval" was the first batch of 5,033 short-listed enterprises, mainly including Qiantuan and its member enterprises, key tax source enterprises and some enterprises with A-level tax credit rating.