It is real positioning, the GPS of the SF Express cart is detected in real time.

Shunfeng Express is a regular enterprise, their service quality is better, you can check the subway of your courier on your cell phone, and the time of delivery, so its GPS is real-time.

Shunfeng Express Introduction:

Shunfeng an intelligent logistics operator with network scale advantage. After years of dedicated operation and forward-looking strategic layout, SF has formed a comprehensive logistics service network with "sky network + ground network + information network" that can cover both domestic and international markets, and its directly-managed network is the domestic counterparts with strong network control, high stability, and a unique and scarce comprehensive logistics network system.

The above content reference? Baidu Encyclopedia - SF Express