三友化工(600409.SH)：全资子公司唐山三友精细化工有限公司投资建设的氯化亚砜目前处于建设期，尚未投产

Group 1 - The core point of the article is that Sanyou Chemical's wholly-owned subsidiary, Tangshan Sanyou Fine Chemical Co., Ltd., is in the process of constructing a facility with an annual production capacity of 40,000 tons of thionyl chloride, which is currently in the construction phase and has not yet commenced production [1] Group 2 - The investment in the thionyl chloride production facility indicates the company's strategic focus on expanding its chemical production capabilities [1] - The construction of the facility reflects the company's commitment to enhancing its operational capacity in the fine chemical sector [1] - The current status of the project being in the construction phase suggests potential future growth opportunities once production begins [1]