Firstly, for exported goods, a company can begin their customs declaration three days before they enter the customs-supervised field.

Secondly, for imported goods, a company may go through a customs declaration procedure after the goods are transported out of the country of origin, but before they arrive in China, with prompt, complete, and precise electronic evidence and documentation submitted to customs by their agent(s). If complete import evidence cannot be submitted to customs, the "transportation vehicle name" and the "bill number of lading (cargo)" can be kept blank initially when the company applies.

The characteristics of "convenient customs clearance" are favorable treatments like an advance customs declaration, urgent customs clearance, indoor verification, a guaranteed pass, online customs declaration, and networked supervision of processing trades, therefore possibly avoiding conventional customs declaration methods and processes.