Major A-share indices fell collectively. As of the midday close, the Shanghai Index fell 0.41% to 3158.03 points, the Shenzhen Stock Exchange Index fell 0.56%, and the GEM Index fell 0.62%. More than 3,900 shares fell, and the two markets traded 5,137 yuan in half a day.

On the plateAIPC concept stocks fluctuated higher, Yingli shares rose by 20cm, Siquan New Materials rose by more than 12%, Microsoft launched the new artificial intelligence computer Copilot+PC; pork stocks rallied, Zhenghong Technology 2, Xinwufeng rose more than 5%, and pig prices continued to rise recently; copper foil concept stocks rose more than 16%; British Union shares and Vogue Optoelectronics rose and stopped; leading copper-clad company Jiantao Laminated Board issued a price increase letter on the 20th; some real estate stocks rose, and many stocks such as Chongqing Development and Rongan Real Estate Halted; consumer electronics, banking and other sectors registered the highest gains. Gold stocks declined, Feinan Resources fell nearly 8%, Hunan gold fell more than 7%; oil and gas stocks generally fell, while Tongyuan Petroleum fell by more than 5%; sectors such as industrial metals, defense and military, and auto parts registered the highest declines.

AIPC concept stocks fluctuated higher, Yingli shares rose and stopped by 20cm

Yingli shares rose 20 cm, Siquan New Materials rose more than 12%, Thor Technology rose more than 10%, and Longqi Technology, Huaqin Technology, Softcom Power, and Xinhai Technology followed suit. According to the news, at the Microsoft Build Developer Preview Conference, Microsoft launched a new artificial intelligence computer called CoPilot+ PC and described it as a new type of Windows PC.

Pork stocks continue to boost Zhenghong Technology's second consecutive market

Zhenghong Technology is on the second consecutive board. Xinwufeng and Delis rose more than 5%, Jingji Zhinong rose more than 4%, and Xiangjia Co., Ltd., Shunxin Agriculture, and Jin Xinnong followed suit. According to the news, pig prices have continued to rise recently, from 14.8 yuan/kg before May 1st to around 15.4 yuan/kg on May 17, and the rise in pig prices accelerated over the weekend. Yongyi monitors that the average price of pigs rose by about 0.38 yuan/kg last weekend. As of May 19, the average price of pigs nationwide was about 15.8 yuan/kg, and pig prices in many places exceeded 16 yuan/kg.

Copper foil concept stocks boosted Wanshun New Materials by more than 16%

Wanshun New Materials rose more than 16%; Yinglian shares, Jingwei Huikai, and Vogue Optoelectronics rose and stopped; Zhongyi Technology rose nearly 9%. Jiaocheng Ultrasound, Copper Crown Copper Foil, and Fangbang Technology had the highest gains. According to the news, Jiantao Laminate, a leading copper-clad board company, issued a price increase letter on the 20th. The reason for the price adjustment was rising copper prices and full orders. Analysts believe that Jiantao's price increase is expected to trigger other manufacturers in the industry to follow suit.

Gold stocks pulled back, Feinan Resources fell nearly 8%

Feinan Resources fell nearly 8%, Hunan Gold and Pengxin Resources fell more than 7%, Huayu Mining and Haotong Technology. Mancaron fell more than 6%, while Mingpai Jewelry, Chifeng Gold, Luoyang Molybdenum, and Yintai Gold all fell more than 5%.