The validity period of a license in Trial state is only 60 days. If the validity period expires, related features controlled by the license and configurations that have been successfully delivered are retained, and the related features properly take effect, You can delete existing service configurations related to the feature, but cannot add new configurations..

Please apply for a new license and activate it before the original license expires so that services are not affected. 

For details, see the CE Series Switches License Usage Guide.

                               Step 1      Log in to the enterprise technical support website at http://support.huawei.com/enterprise.

                               Step 2      Click Switches.

                               Step 3      Click the name of the product to be queried, for example, CE12800.

                               Step 4      Choose Installation & Upgrade > License Guide to find the License Usage Guide for your switch model.

CE12800 Series Switches License Usage Guide

http://support.huawei.com/enterprise/en/doc/DOC1000150343/?idPath=7919710|21782165|21782236|22318638|7542409

CE8800&7800&6800&5800 Series Switches License Usage Guide

http://support.huawei.com/enterprise/en/doc/DOC1000150334/?idPath=7919710|21782165|21782239|22318536|21128158