China is sparing no effort to ensure its first Group of 20 summit passes off perfectly, enforcing measures to close factories, offer English lessons to elderly residents and even a $1.5 billion giveaway to get some to leave town.

China is determined to impress the leaders of the world's 20 leading rich and developing nations due to attend the Sept. 4-5 summit in the eastern city of Hangzhou, whose lakefront scenery has inspired generations of painters and poets.

Preparations range from a ban on flights by drones or model aircraft sent aloft by hobbyists, to restrictions on the guests hotels may host, besides nearly 700 projects to refurbish expressways and waterworks.