Group 1 - The CPO concept stocks in the A-share market experienced a collective decline, with notable drops in several companies [1] - Shijia Photon fell over 6%, while Dekeli and Jingwang Electronics dropped over 5% [1] - Other companies such as Xinyi Sheng, Kecuan Technology, Zhongji Xuchuang, and others also saw declines exceeding 4% [1] Group 2 - Specific stock performance includes: - Shijia Photon (688313) down 6.18% with a market cap of 31.8 billion and a year-to-date increase of 324% [2] - Dekeli (688205) down 5.49% with a market cap of 14 billion and a year-to-date increase of 27.22% [2] - Jingwang Electronics (603228) down 5.18% with a market cap of 68.6 billion and a year-to-date increase of 156.57% [2] - Xinyi Sheng (300502) down 4.94% with a market cap of 330.5 billion and a year-to-date increase of 304.38% [2] - Kecuan Technology (603052) down 4.92% with a market cap of 6.755 billion and a year-to-date increase of 41.61% [2] - Zhongji Xuchuang (300308) down 4.48% with a market cap of 520.1 billion and a year-to-date increase of 280.91% [2]