Group 1 - The core viewpoint of the article highlights a short-term surge in the photolithography machine concept stocks, indicating a positive market sentiment towards this sector [1] Group 2 - Mei Ai Technology reached a "20cm" limit up, showcasing significant investor interest and confidence in its stock performance [1] - Ke Ma Technology saw an increase of over 15%, reflecting strong market demand and potential growth in the photolithography sector [1] - Tong Fei Co., Ltd. experienced a rise of over 14%, further indicating a bullish trend among companies involved in photolithography technology [1] - Other stocks such as Hengkun New Materials, Dongcai Technology, Aisen Co., Shanghai Xinyang, and Maolai Optics also followed the upward trend, suggesting a broader market rally in this industry [1]