ZTO Express sent me a short message informing me that my package was not in the service area.

Get someone to pick it up. You didn't add money and thought he would deliver it to you personally? Unlikely, unless the boss of his outlet is in a good mood to bring the goods next time, he won't send them. In case they stop at the destination exit for a while, they will send them back to your shipping place. Zhongtong's outlets are all over the country, so it is impossible to expect to send other peers.