JD.COM's order trajectory is usually accurate, but due to some external factors, such as weather and logistics delay, the order trajectory may be delayed. You should be talking about satellite positioning, which is also related to the distribution route and network signal delay, so there is also uncertainty. In order to avoid such problems, you can communicate with the courier brother in advance to avoid missing or wasting each other's time. If there is an electronic intelligent parcel cabinet near your home, you can ask the courier to put the parcel in the cabinet. I hope my answer is helpful to you!