Central China Securities released a research report on October 21, saying that it gave Huihuang Technology (002296. SZ, latest price: 9.09 yuan) an overweight rating. The reasons for the rating mainly include: 1) the gross profit margin of the main product monitoring product line has increased significantly, and the cost control ability has been improved; 2) Continue to increase investment in research and development, accelerate the market application of new products, and enrich the product structure; 3) The rail transit industry continues its high investment trend over the past decade or so. Risk warning: the research and development of new technologies is less than expected; Accounts receivable recovery risk; Increased competition in the industry; Risks of industry policy changes. Article source: Daily Economic News Original title: Central China Securities...