B
The channels you configure must be supported by STAs; otherwise, the STAs cannot discover radio signals. For example, when the country code is set to CN, 5 GHz channels 36, 40, 44, 48, 52, 56, 60, and 64 can be configured. However, most STAs do not support these channels currently. If these channels are configured, the STAs cannot discover radio signals. In this case, you can configure 5 GHz channels 149, 153, 157, 161, and 165 that are supported by the STAs.
https://support.huawei.com/enterprise/en/doc/EDOC1000060368/90dc3c14/troubleshooting-radio-calibration-does-not-take-effect