Delivery service personnel and volunteers are playing an increasingly vital role in securing basic necessities for residents in Shanghai's locked-down communities.A Shanghai resident surnamed Ling, whose family member suffers from a chronic hematology condition, managed to order a drug from Meituan's online pharmacy service."\\;I used to get the prescribed drug from Ruijin Hospital's Jiading branch, but now, I can only try my luck by turning to online delivery services,"\\; he said.