中达安跌2.04%，成交额1286.36万元，主力资金净流出148.36万元

Group 1 - The core point of the article highlights the recent stock performance of Zhongda An, which saw a decline of 2.04% on December 22, with a current price of 15.88 yuan per share and a market capitalization of 2.225 billion yuan [1] - The company has experienced a year-to-date stock price increase of 62.21%, but has seen a decline of 1.67% over the last five trading days and 7.57% over the last twenty days [1] - Zhongda An's main business involves project management services, primarily engineering supervision, with revenue contributions from various sectors including power supervision (20.73%), civil engineering supervision (19.72%), and consulting and agency services (18.20%) [1] Group 2 - As of September 30, the number of shareholders for Zhongda An was 8,906, a decrease of 41.07% from the previous period, while the average circulating shares per person increased by 69.71% to 13,520 shares [2] - For the period from January to September 2025, Zhongda An reported operating revenue of 469 million yuan, a year-on-year decrease of 5.03%, and a net profit attributable to shareholders of 980,200 yuan, down 56.30% year-on-year [2] - Since its A-share listing, Zhongda An has distributed a total of 30.3829 million yuan in dividends, with 1.3632 million yuan distributed over the past three years [3]