(Bloomberg) -- China lifted a ban on group tours to a slew of countries including the US, UK, Australia, South Korea and Japan, in a major test of demand for overseas travel from what was once the world’s biggest source of tourists.Most Read from BloombergEcuador Presidential Candidate Assassinated, Suspect Shot DeadRetirees Face $17,400 Cut to Social Security Benefits in 2033First American City to Tame Inflation Owes Its Success to Affordable HousingEveryone Wants to Work at UPS After Teamsters