接公安局通知，留學生的簽證辦理將做以下變動：

1. 對于持有居留許可的學生，請至少提前30天到深圳市公安局出入境管理處提交延期申請，否則不給與辦理；

2. 對于持非居留許可類簽證的學生，請至少提前7天到深圳市公安局出入境管理處提交簽證申請，否則不給與辦理；

3. 新簽證簽發需15個工作日；

4. 新居留許可的有效期至少為180天。

According to the Shenzhen Public Security Bureau, policies of Visa Application have the following important changes:

1. Student who holdsresidence permit (student visa)must submit your visa application to Shenzhen Public Security Bureau at least 30 days before your visa expires; otherwise, application will not be accepted.

2. Student who holdsL-visa, F-visa or X-visamust submit your visa application to Shenzhen Public Security Bureau at least 7 days before your visa expires; otherwise, application will not be accepted.

3. The processing time is 15 working days after you submit your application.

4. The validity of your new residence permit is 180 days or more.