Short answers, pulled from the story.
The official name is Chongqing Municipality. It was established on the 18th of June 1997 after the Eighth National People's Congress decided to merge the sub-provincial city with adjacent prefectures on the 14th of March 1997.
Chongqing served as the provisional capital from 1937 to 1945. The city was formally declared the wartime capital on the 6th of September 1940 after General Chiang Kai-shek and the army retreated from Wuhan in 1938.
Chongqing experiences fog for 68 days per year. The city is known as the Fog City due to its frequent monsoon conditions and high humidity that often shroud the area in a thick layer of fog.
The Chongqing Rail Transit Line 2 and Line 3 form the world's longest and busiest monorail system. This network includes 70 stations and connects the airport to the southern part of downtown.
Chongqing Municipality contains 30,020,000 people in forty-three former counties. The urban population surpassed Shanghai as China's largest municipality by urban population in 2020 with 23.01 million residents.