Q1: (SQ) What factors are related to Hong Kong people’s travel demand to mainland China?
The ratio of HK’s real GDP per capita to Mainland China’s real GDP per capita, the level of consumer price, the currency exchange rate (HKD/RMB)
Q2: (SQ) What factors are related to the total retail sales in Hong Kong?
Number of Hong Kong residents’ departure, population of Hong Kong, number of visitors to Hong Kong, price level, average income, pandemic