**Chinese Premier League: Interpretation of new U23 player appearance rules**

The Chinese Premier League (CPL) has introduced new regulations for the U23 players, which have been in place since January 1st, 2021. The new regulations aim to improve the quality and competitiveness of the league by promoting younger players.

According to the new regulations, all U23 players must be registered with their respective clubs before the start of each season. This means that if a club wants to sign a young player, they need to register him or her as an U23 player before the end of the previous season.

In addition, the number of U23 players on a team's roster is limited to three per match. If a team exceeds this limit, it will receive a fine. Furthermore, the league has also established a U23 squad system, which allows teams to select up to four players from the U23 squad to play in every game.

These new regulations are aimed at giving more opportunities to young players, who may not have had enough experience playing in senior leagues. By registering them earlier and limiting the number of U23 players on the roster, the league hopes to create a more competitive environment where these players can develop and showcase their skills.

Overall, the new U23 player appearance rules are a positive step towards improving the quality of football in China. It is important to note that these regulations do not mean that older players cannot play in the league anymore. In fact, the league has always prioritized fairness and equality in its decision-making process.