Core Viewpoint - The rise of celebrity-led knowledge payment courses, exemplified by Wang Feng's music classes, highlights a new trend where stars leverage their fame to monetize educational content, despite facing challenges in course quality and consumer trust [1][18]. Group 1: Wang Feng's Music Course - Wang Feng launched a music course titled "30-Day Music Elevation Plan," targeting beginners and covering various aspects of music education [3][5]. - The course is marketed using Wang Feng's celebrity status, with a significant fan base on platforms like Douyin, which aids in driving sales [3][5]. - Initial sales were promising, with over 5,600 courses sold on the first day, but subsequent daily sales dropped to 25-50 units, indicating reliance on short-term promotional strategies [5][18]. Group 2: Market Trends in Celebrity Knowledge Payment - The knowledge payment market has seen significant growth, with the market size in China increasing from 2.65 billion yuan in 2016 to 112.65 billion yuan in 2022, and projected to reach 280.88 billion yuan by 2025 [13][14]. - The demand for interest-based education is expanding, particularly among younger demographics, with a notable shift towards online learning [14]. - Celebrity courses are becoming a new avenue for monetization, with various stars like Wu Yanzu and Wang Lihong successfully launching their own educational programs [7][9][11]. Group 3: Challenges Faced by Celebrity Courses - Despite the initial success, there are concerns regarding the quality of content in celebrity-led courses, with some consumers questioning whether they receive substantial educational value for the price [16][18]. - Service issues have been reported, including inadequate support and management for students, which can lead to dissatisfaction [16][18]. - Trust in celebrity courses is fragile, as any negative publicity surrounding the celebrity can adversely affect the perceived value of the courses [16][18].