As a courier, what makes you sad?

Not everyone is at home. Sometimes, calling in advance in vain, the dialing time, answering time, talking time and communication time have exceeded the basic delivery time of each courier (30 pieces are delivered in an hour on average, and delivered in two minutes on average 1 piece). If you forget to take it, you will lose it, and others will take it by mistake. Call the courier and complain about you. It's all your fault. Complaints, lost goods and overtime will be deducted, so courier is a very hard industry that is not understood by others.