Why don't Wuhan connect Hanyi high-speed railway with the old Beijing-Guangzhou line or Wuhan-Guangzhou high-speed railway and let you take the train directly from Changsha to Nanjing?

What is the relationship between Nanjing and Hanyi? The railway is through, but cars can't run together. Wuhan-Guangzhou is a high-speed railway with high speed and high safety requirements. Maybe some people don't know yet. Every morning, before the official sports car of Wuhan-Guangzhou high-speed railway, there is a high-speed railway inspection car from Wuhan to Guangzhou. The line safety inspection of the whole high-speed rail line is to ensure the safety of high-speed rail transportation above 300km/h. Have you ever seen a high-speed rail line running in the middle of the night? It is conceivable that many others will have the same idea after the opening of Changsha to Nanjing. More trains and more capacity will lead to line overload and many unsafe factors. And the three railway stations in Wuhan have a large carrying capacity. Although only one train is added, the station has to undertake many tasks such as picking up the station, dispatching the station and transporting passengers, and the requirements of each task are very precise. Perhaps in the near future, after overcoming many technical and security problems, it will be open. After all, the railway is the main transportation capacity of China, so it will be much more convenient for everyone to take the train.