For the first time in three years, China on Sunday opened its borders and welcomed international travellers and returning residents without the need for them to go under quarantine, even as infections continue to surge after Beijing scrapped its stringent zero-Covid policy. The first flights under China's new "no quarantine" rules for international travellers landed at the airports in Guangzhou and Shenzhen in southern Guangdong province on Sunday morning, the state-run CGTN TV reported. Officials said 387 passengers were aboard two flights from Toronto and Singapore on the day the country ended its strict Covid-19 restrictions for travellers. On Sunday,…