Open Source Securities released a research report on April 21 stating that it gave Sino-Singapore Group (601512.SH) a buying rating. The main reasons for the rating include: 1) improving the quality and efficiency of park operations, and land concessions fall short of expectations; 2) industrial investment is growing efficiently, and new energy development can be expected in the future; 3) operating cash flow has improved markedly, and the increase in expenses during the period dragged down performance. (Mainichi Keizai Shimbun)