A股光刻胶概念股走强，南大光电涨超4%

Group 1 - The core viewpoint of the news is that the A-share market for photoresist concept stocks has shown strong performance, with several companies experiencing significant stock price increases [1] Group 2 - Saiwei Electronics (300456) saw a stock price increase of 14.01%, with a total market capitalization of 22.3 billion and a year-to-date increase of 77.59% [2] - Tengjing Technology (688195) experienced an 11.15% rise, with a market cap of 19.5 billion and a year-to-date increase of 275.25% [2] - Guofeng New Materials (000859) increased by 9.97%, with a market cap of 6.424 billion and a year-to-date increase of 41.70% [2] - Tongcheng New Materials (603650) rose by 7.06%, with a market cap of 25.3 billion and a year-to-date increase of 19.30% [2] - Dongfang Jiasheng (002889) increased by 6.37%, with a market cap of 6.118 billion and a year-to-date increase of 13.31% [2] - Nanda Optoelectronics (300346) saw a 4.32% increase, with a market cap of 26.9 billion and a year-to-date increase of 21.84% [2] - New Lai Materials (300260) rose by 3.64%, with a market cap of 22.6 billion and a year-to-date increase of 105.07% [2] - Xingye Co., Ltd. (603928) increased by 3.32%, with a market cap of 4.162 billion and a year-to-date increase of 93.98% [2] - United Chemical (301209) saw a 3.26% increase, with a market cap of 13 billion and a year-to-date increase of 500.15% [2] - Jiaxian Co., Ltd. (920489) rose by 3.14%, with a market cap of 2.78 billion and a year-to-date increase of 25.17% [2] - The MACD golden cross signal formation indicates a positive trend for these stocks [1]