Hi Hummer!
Please follow this link:
https://support.huawei.com/hedex/pages/EDOC1100046473CEH10178/03/EDOC1100046473CEH10178/03/resources/en-us_topic_0093017821.html#EN-US_TOPIC_0093017821__fig_00036_01.
Viewing Operation LogsOperation logs record information about operations and system maintenance tasks performed by IVS users on the OMU and CU and log information generated when system-scheduled tasks are executed. Operation logs can be searched for and exported on the OMU portal.
On the OMU portal, you can:
1. Search for operation logsgenerated in a specified time segment.
2. Export all operation logs orselected logs.
Searching for and Exporting Operation LogsThis topic assumes that you want to search for and export all logs about the user management operations performed on the active MPU from May 7th to May 9th, 2013. You can proceed as follows:
1. On the Maintenance page, click the Operation Log tab.
2. Select the main MPU NE in System Domains.
3. Set search criteria, as shown in Figure 1. Figure 1. Search criteria