两大板块，涨停潮！

Market Overview - The A-share market showed overall strength on December 22, with the Shanghai Composite Index returning above the 3900-point mark [1][4]. Key Sectors - The communication sector led the gains, with an intraday increase exceeding 4%. Notable stocks included Changxin Bochuang and Dingdao Technology, which saw price increases of over 10% [4]. - The Hainan Free Trade Zone concept also experienced a surge, with multiple stocks hitting the daily limit up, including Shennong Agricultural and Kangzhi Pharmaceutical [8][10]. Notable Stocks - In the communication sector, key stocks and their performance included: - Changxin Bochuang: Current price 157.55, up 13.10% [5] - Dingdao Technology: Current price 109.23, up 10.22% [5] - Special Information: Current price 12.94, up 10.03% [5] - Hengtong Optic-Electric: Current price 26.14, up 10.02% [5] - Changfei Optical Fiber: Current price 127.05, up 10.00% [5] - In the Hainan Free Trade Zone sector, notable stocks included: - Shennong Agricultural: Price increased by 20.03% [9] - Kangzhi Pharmaceutical: Price increased by 19.96% [9] - Hainan Airport: Price increased by 10.06% [9] Other Sectors - Other sectors that saw gains included non-ferrous metals, electronics, and comprehensive sectors, with intraday increases exceeding 2% [6]. - Basic chemicals, steel, machinery, and defense industries also followed suit with positive movements [7].