Hello!
What's the model of your router?
If your router is an Enterprise router, like the AR series, you can refer to the following link to limit user bandwidth:
https://support.huawei.com/hedex/hdx.do?docid=EDOC1100007335&id=dc_ar_easyweb_sac_0003&lang=en.
If your router is a home router, please visit the Huawei Consumer Website (http://consumer.huawei.com/en/) or Hotline Service for a professional answer (https://consumer.huawei.com/en/support/hotline/).
Let us know how we could help you out more.