The QoS should be planned according to service requirements.

Huawei QoS describes PQ (Priority Queuing) as the strict-priority scheduler ensuring that high-priority queues are served first before lower-priority queues. WRR/DRR/RR are weighted or round-robin modes intended for fair sharing and do not guarantee strict preemption for latency-sensitive traffic. Therefore, PQ is selected for higher-priority services (e.g., voice, control).