Market Overview - The A-share market showed mixed performance today, with the Shanghai Composite Index rising by 0.39% to close at 3457.75 points, while the Shenzhen Component Index increased by 0.11% to 10476.29 points. However, the Sci-Tech Innovation 50 Index fell by 0.86% to 994.80 points, and the ChiNext Index decreased by 0.24% to 2147.92 points. Overall, 2628 stocks rose, 2542 fell, and 247 remained unchanged across the market [1]. - The total trading volume in the Shanghai and Shenzhen markets was 14660 billion, a decrease of 208.42 billion compared to the previous trading day [1]. Industry Performance - Among the Shenwan first-level industries, sectors such as comprehensive, pharmaceutical biology, banking, non-ferrous metals, public utilities, and building materials led the gains, while computer, retail, telecommunications, media, power equipment, and real estate sectors experienced declines [1]. Sector Highlights - The top-performing concept sectors today included China Shipbuilding System, innovative drugs, antibiotics, vitamins, generic drugs, low-priced stocks in the ChiNext, hydropower, biotechnology, advanced packaging, superhard materials, pet economy, CRO, medical material exports, selected banks, and brain-computer interfaces [1].

证券研究报告 | 策略点评 2025 年 05 月 20 日 投资要点 分析师：孟之绪 执业编号：S0300524080001 电话： 邮箱：mengzhixu@ykzq.com 投资策略研究 粤开市场日报-20250520 今日关注 指数涨跌情况：今日 A 股主要指数多数上涨。截止收盘，沪指涨 0.38%，收报 3380.48 点；深证成指涨 0.77%，收报 10249.17 点；科创 50 涨 0.24%，收报 997.68 点；创业板指涨 0.77%，收报 2048.46 点。总体上，全天个股涨多跌 少，Wind 数据显示，全市场 3836 只个股上涨，1376 只个股下跌，199 只个股 收平。沪深两市今日成交额合计 11698 亿元，较上个交易日放量 832.34 亿元。 行业涨跌情况：今日申万一级行业除国防军工、煤炭、钢铁、房地产下跌外， 其余全部上涨，美容护理、综合、传媒、家用电器、医药生物、轻工制造等 行业领涨。 板块涨跌情况：今日涨幅居前概念板块为宠物经济、动物保健精选、三胎、 谷子经济、培育钻石、饲料精选、超硬材料、水电、医美、小红书平台、仿 制药、黄金珠宝、首发经济、央企汽车、生物科技 ...

Core Insights - The company reported a significant decline in net profit by 44.79% year-on-year, indicating challenges in profitability [3] - Operating cash flow increased by 101.87%, reflecting improved cash generation capabilities [6] Revenue Summary - The company's revenue for 2024 was approximately 686.22 million yuan, down 8.74% from 2023 [2] - Revenue from synthetic diamonds grew by 46.83%, while diamond micro-powder revenue fell by 72.80% [2] Profit Summary - Net profit attributable to shareholders was approximately 200.83 million yuan, down from 363.72 million yuan in 2023 [3] - Basic earnings per share decreased to 0.79 yuan from 1.40 yuan, a decline of 43.57% [3] Expense Summary - Sales expenses increased by 7.81% to approximately 6.96 million yuan, indicating stable marketing investment [4] - R&D expenses decreased by 22.70% to approximately 33.90 million yuan, which may impact future innovation [4] R&D Summary - The number of R&D personnel increased by 11.32% to 118, with R&D personnel accounting for 15.61% of the workforce [5] - R&D investment as a percentage of revenue decreased slightly to 4.94% from 5.83% [5] Cash Flow Summary - Net cash flow from operating activities was approximately 567.86 million yuan, up from 281.30 million yuan in 2023 [6] - Investment cash flow showed improvement, with net cash outflow decreasing significantly [6] Management Compensation - Management compensation remained stable, with the chairman receiving approximately 389,000 yuan and the general manager receiving approximately 654,200 yuan [9]