基础化工行业周报：国际汽油、国际柴油等涨幅居前，建议继续关注石化板块、钛白粉板块和轮胎板块

Investment Rating - The report maintains a "Buy" rating for several companies in the chemical industry, including China Petroleum, Sinopec, and others [7]. Core Viewpoints - The report suggests focusing on undervalued, high-dividend companies like China Petroleum due to the recent drop in oil prices, which is expected to ease cost pressures and improve profitability [4][14]. - The chemical industry is anticipated to enter its best demand season of the year, with specific recommendations to pay attention to sectors like tires, upstream mining, and titanium dioxide [6][15]. - The report highlights that many sub-sectors within the chemical industry have shown poor performance due to capacity expansions and weak demand, but some sectors, such as tires and upstream mining, have exceeded expectations [5][15]. Summary by Sections Chemical Industry Investment Recommendations - The report emphasizes the importance of monitoring the refining sector, particularly China Petroleum, as oil prices are under pressure [4][14]. - It notes that international oil prices have recently declined, with WTI at $68.18 per barrel, down 3.97% from the previous week, and Brent at $71.98, down 3.37% [14][15]. - The report indicates that the chemical industry is expected to benefit from a seasonal demand increase as the "golden September and silver October" approach [6][15]. Price Movements - Significant price increases were observed in international gasoline (up 3.50%) and diesel (up 3.47%), while products like titanium concentrate and PVA saw declines [14][15]. - The report details that the prices of several chemical products have rebounded due to improving downstream demand, although many products still face price declines [5][15]. Focus on Leading Companies - The report recommends focusing on leading companies in various sub-sectors, such as Wanhua Chemical in polyurethane, Hualu Hengsheng in coal chemical, and Longbai Group in titanium dioxide [6][15]. - It highlights the potential for valuation recovery among leading companies in the chemical sector, particularly those with strong cost advantages and stable competitive landscapes [6][15].