You can run the display elabel command to view the equipment serial number of a device.
The BarCode field in the command output indicates the serial number, for example,
210235293310B5000001.
The following describes the meanings of characters in 210235293310B5000001:
21: indicates a module (such as a card) or the device.
0235xxxx/0231xxxx: indicates the part number of the device or module, which is allocated by Huawei.
10: indicates the manufacturer. 10 indicates Huawei.
B: indicates the year when the product was produced. 9 specifies 2009, A specifies 2010, B specifies 2011, and so on.
5: indicates the month when the product was produced.
000001: specifies the sequence number of the device, module, or board.