It means the system has left the manufacturer's assembly plant in China, and is in transit to a logistics hub in your country. The quoted delivery time is after it reaches your nation's hub - there is currently much upheaval in international shipping, and it can take time for the shipment to reach there from where it's made.  
I ordered a laptop week ago. In website it mentions 2-4 businessd ays dwlivery in Australia. Its been a week now and it still shows "in transit to local hub".Called cuatomer care team twice. They picked first call after 85 minutes on waiting and then hung up after asking order number abd same with second call after 74 minutes. Pathetic customer service. I was wondering what that IN TRANSIT TO LOCAL HUB means
Delivery time