I received a courier that wasn't mine, Zhihu.

First of all, check your recent online shopping records to see if there is any undelivered express delivery, whether the address is filled in correctly, where is the logistics tracking, and see multiple platforms.

Then, ask your family, relatives, friends and colleagues if they have sent you a courier.

Finally, all the above have been ruled out, and it is basically certain that it is not your courier. Your personal information is likely to be stolen.