Group 1 - The core issue faced by athletes like Fan Zhendong is balancing public expectations and personal ideals, which is a complex challenge in the fame-driven sports industry [1][10][11] - Fan Zhendong has expressed his struggles with the pressures of fame, including incidents of privacy invasion and the impact of fan culture on his mental health [6][7][17] - The commercial value of athletes in table tennis is increasing, with Fan Zhendong being one of the most commercially valuable athletes in China, attracting partnerships with various brands across multiple sectors [14][22] Group 2 - The phenomenon of fan culture, while providing financial freedom to athletes, also brings significant psychological burdens, as seen in Fan Zhendong's experiences [6][17] - The marketization of table tennis is still developing, but the current generation of athletes is capitalizing on their fame to secure endorsements and brand partnerships [12][13] - Fan Zhendong's recent move to play in the German Bundesliga has generated significant media attention and commercial interest, highlighting the potential for increased visibility and revenue in international markets [14][20]