NG was short for the National Games, which was the highest and largest comprehensive sports event in the country. In addition to the martial arts project, the National Games were basically on the same level as the Olympic Games. There were even winter Olympic events in the early years such as skating.
Ordinary people probably would not pay much attention to the National Games. But for the Provincial Sports Bureaus, the National Games was only second to the Olympic Games.
Since the provincial training teams were not eligible to attend national sports games, the National Games became the highest stage they could ever see. Each Provincial Sports Bureau looked to the National Games to show off their achievements. Thus, the National Games was also nicknamed the Olympic Games in the sports world.