Do I need an ID card to send something to a hotel in Shenzhen?

No need. You don't need an ID card to send something to a hotel in Shenzhen. You only need an ID card to stay in a hotel in Shenzhen. You can also apply for e-temporary id card to check into the hotel. Shenzhen, referred to as Pengcheng for short, is a sub-provincial city, a city with separate plans and a megacity under the jurisdiction of Guangdong Province. It is also a China Special Economic Zone, a national economic center city and an international city approved by the State Council.