商业航天概念延续强势，广联航空、瑞华泰、优机股份涨超10%

Core Viewpoint - The commercial aerospace sector continues to show strong performance, with several companies experiencing significant stock price increases on December 19. Group 1: Company Performance - Guanglian Aviation, Ruihua Tai, and Youji Co. saw stock price increases of over 10% [1] - Guojijiang Precision, Aerospace Zhizhuang, Tongyu Communication, and Western Materials experienced stock price increases of over 7% [1]