本门户围绕 assay 逻辑、规格风险、物流选择权、单证质量、可持续状态和合规背景来组织内容。
专业市场并不只由 headline price 决定，更受原油质量、规格合规、物流选择权、融资和监管影响。
API gravity, sulfur, TAN, metals and product yield define how a barrel behaves commercially.
What is saleable on paper must also be saleable in the tank, at customs and under the chosen certification system.
Freight, tanks, line fill, heating, contamination risk and demurrage often matter as much as flat price.
Sanctions, customs, product law and sustainability evidence can widen or close a market.
本页现在连接到更多深度模块，包括利润逻辑、assay解读、运费结构、贸易融资和供应链风险。
