Group 1 - Pingtan Development opened up 6.68% after 12 consecutive days of gains [1] - Yingxin Development, involved in mergers and acquisitions, opened up 8.06% after 11 days of gains [1] - Antai Group, a low-priced coal stock, opened up 2.05% after 13 days of gains [1] Group 2 - Hezhong China, a cross-strait concept stock, opened up 10.03% after 5 days of gains [1] - Shenzhou Information, a quantum technology concept stock, opened down 4.12% after 8 days of gains [1] - Kangsheng Co., involved in liquid cooling servers, opened down 0.76% after 4 days of gains [1] Group 3 - Chunzong Technology opened up 3.07% after 4 days of gains [1] - Yue Media, a short drama concept stock, opened up 9.92% after 5 days of gains [1] - Huanrui Century opened up 1.66% after 2 days of gains [1] Group 4 - Haima Automobile, a local Hainan stock, opened up 9.50% after 2 days of gains [1] - Xinlong Holdings opened up 7.04% after 2 days of gains [1]