Beijing: International airlines have started to resume flight operations to China after a loosening of aviation restrictions brought in as part of the country's response to the Covid-19 pandemic, South China Morning Post reported.Lufthansa, part of Europe's largest airline group, restarted flights to the mainland this week, operating once a week between Frankfurt and Shanghai in the first regular scheduled flights operated by the German carrier since the pandemic began."The flights between Shanghai and Frankfurt are hopefully only the first of further Lufthansa Group connections in the coming weeks and months between mainland China and our home markets Germany, Austria, and Switzerland," said Veli Polat, Lufthansa's head of sales for.