Since 20 15 10+0, China Unicom has introduced the policy that the remaining traffic of mobile phone customers in the current month will not be cleared in a single month, and some of the traffic of users in the current month can be postponed until the end of the next month. For example, there is surplus traffic in May 438+10 in June, which can be carried forward to the end of June 165438+ 10 for continuous use, and so on in subsequent months. The traffic in September is not carried forward at 10.