Shopping in JD.COM, because the order tracking is not displayed, the express delivery is left at the unit doorman without notice. Who will be responsible?

According to common sense, the courier should be responsible, because you left something at the doorman without notice. The doorman also has some responsibilities. He should inform you to pick it up after receiving it. Secondly, you should call earlier, not wait 20 days for consultation. General units have monitoring, right? You should know by watching the surveillance.