请介绍一下当前中国智能影像设备行业的发展情况。 运动相机："中国智造"的影像时代 20250822 摘要 智能影像设备市场规模约 500 亿元人民币，2017-2023 年复合年增长 率约 15%，受益于短视频发展，增速有望提升至 20.8%。手持设备年 销量约 4,000 万台，全景运动相机占比不足 200 万台。 行业竞争格局集中，GoPro、影石创新和大疆为头部企业，年出货量合 计约 700 万台。但市场存在大量低端产品，高端市场份额集中于头部企 业，低端产品价格在 1,000 元以下，头部企业产品价格在 2,500-3,000 元以上。 影石创新定义了全景运动相机品类，占据该市场近 70%份额，理光和 GoPro 分别占 12%和 9%。广角运动相机市场规模更大，但竞争更分散， GoPro 在该市场保持领先地位。 大疆在 2025 年之前没有全景运动相机产品，其手持智能影像设备主要 为广角运动相机。影石创新在推出全景运动相机后进入广角市场，产品 力提升有望逐步挤占 GoPro 市场份额。 广角运动相机市场竞争者众多，包括元创新、爱建、SG Can 等，主要 通过线上销往海外，受益于海外用户运动需求和 ...

Core Viewpoint - The article discusses the decline of classical internet platforms, highlighting recent acquisitions of companies like Hupu and Ximalaya, which reflect a significant drop in their market valuations compared to their peak years [4][5][7]. Summary by Sections Recent Acquisitions - Xunlei acquired Hupu for 500 million, while Tencent Music purchased Ximalaya for 2.9 billion, both indicating a trend of established internet companies selling at lower valuations than in their prime [4]. - Hupu and Ximalaya, both over ten years old and once dominant in their niches, are now struggling to maintain their user bases and market positions [4][5]. Historical Context - The closure of platforms like Tianya Forum and the struggles of others like Renren and Douban illustrate the broader decline of classical internet communities [5][9]. - Hupu's valuation dropped from approximately 7.7 billion in 2019 to 500 million in 2023, reflecting a significant loss in user engagement and market value [8]. Financial Performance - Ximalaya's peak valuation was around 5 billion in 2021, but it faced challenges in maintaining growth and profitability, leading to its eventual acquisition by Tencent [7][15]. - Hupu's financial instability is evident from its failed IPO attempts due to high accounts receivable and fluctuating profits, with net profits varying significantly from 2013 to 2015 [14]. Market Dynamics - The rise of mobile internet and social media platforms has shifted user attention away from traditional content communities, leading to a decline in user engagement and content quality [18][19]. - Both Hupu and Ximalaya rely heavily on advertising and subscription models, making them vulnerable to market fluctuations and changes in user behavior [21][22]. Future Prospects - Despite the decline of classical internet platforms, there are still opportunities for niche content platforms to thrive, as seen with companies like Bilibili and Xiaohongshu, which have successfully adapted their business models [26][29]. - The article suggests that while the classical internet era is fading, community-driven platforms still hold potential for growth if they can balance content quality with monetization strategies [31].