Why do you have to transfer from Beijing to go to Italy from Hong Kong?

There is no direct flight to Hong Kong. According to Zhihu's inquiry, you need to transfer from Hong Kong to Italy, because there is no direct flight from Hong Kong to Italy, only a direct flight from Beijing to Italy, so you need to transfer in Beijing. Beijing, referred to as Yanjing and Peiping for short, is the capital, municipality directly under the Central Government, national central city and megacity of People's Republic of China (PRC), the political center, cultural center, international exchange center and scientific and technological innovation center of China approved by the State Council, one of China's famous historical and cultural cities and ancient capitals, and a first-tier city in the world.