Why is my Yunda Express tracking not updating?

Long gaps between scans are normal during line-haul transport inside China and during international air or ocean segments, where the status can stay still for days and then update in a cluster. A parcel held in customs clearance also shows no movement while it is being processed. First confirm you are tracking the carrier waybill, not the order ID, then allow extra time during customs and peak periods such as Singles' Day on November 11.