As the year 2025 approaches, preparations for the new season have begun in full swing for various clubs in the Chinese Super League (CSL). The veteran powerhouse Beijing Guoan has already completed the first phase of their winter training. After the New Year's Day holiday, the team will head to Haikou for the second phase of winter training. Earlier this month, Beijing Guoan officially signed with Spanish coach Quique Setien. In the second phase of winter training, Setien will lead the team in person to practice new formations and tactics. This Spanish coach, who once managed the La Liga giant Barcelona, is very fond of using a passing and possession style of play, which can help Guoan rediscover their most adept tactical approach. In terms of new signings, according to the latest news, Serginho will make his official debut with the team during the second phase of Guoan's winter training. Currently, the procedures for Serginho's naturalization are being expedited, and if all goes well, he can become an official Chinese player before March. At that time, Serginho will not only be able to represent Guoan in the CSL as a domestic player but also participate in the 18-team tournament with the national team. Regarding domestic players, due to participating in the 18-team tournament with the national team, Guoan's Zhang Yuning, Lin Liangming, and Li Lei all suffered varying degrees of injuries, so they did not participate in the first phase of Guoan's winter training. Currently, the injuries of these three national team members have basically healed. However, they still cannot…