The past year has been tough enough for the Chinese economy since the outbreak of COVID-19 in 2020. The country's main economic hub and one of its largest cities, Shanghai, has been closed for at least two months. There are many high-tech enterprises and factories located in Shanghai, and Shanghai is also a logistics center for international trade. Thus, the closure of Shanghai affected not only the economy of the city, but also the development of the economy of all other cities in the country.    In 2022, China's GDP growth was only ...