China A-shares gave up early gains by midday; Shanghai Composite fell 0.27%, Shenzhen Composite dropped 1.24% and ChiNext lost 2.13%. CPO and optical-communications sectors plunged, with Yuanjie Technology, Changguang Huaxin and Dongshan Precision locked at limit-down; Shijia Photonics and Changxin Bochuang also tumbled. Bioproducts underperformed—Jinan Protein, Baipusaisi and Sailun Biotech each slid more than 10%. Semiconductor names were under pressure, including Siruipu, Weidao Nano and Shen

China A-shares gave up early gains by midday; Shanghai Composite fell 0.27%, Shenzhen Composite dropped 1.24% and ChiNext lost 2.13%. CPO and optical-communications sectors plunged, with Yuanjie Technology, Changguang Huaxin and Dongshan Precision locked at limit-down; Shijia Photonics and Changxin Bochuang also tumbled. Bioproducts underperformed—Jinan Protein, Baipusaisi and Sailun Biotech each slid more than 10%. Semiconductor names were under pressure, including Siruipu, Weidao Nano and Shengbang. Battery sector showed strength: Shidai Wanheng extended to a fourth consecutive limit-up, Zizhu High‑Tech to a third, while Fengyuan, Lingpai Technology and Yema Battery hit daily limits.