The formulation adheres to the design style of "premium ocean," utilizing a substantial amount of high-quality Yunnan tobacco leaves, complemented by top-grade tobacco from Henan and Hunan, as well as filler tobacco from Gansu. The proportions of each grade of tobacco are scientifically determined to create the leaf blend formula. Additionally, through the evaluation and testing of the leaf blend, appropriate flavoring agents are applied, ensuring that the product ultimately meets the design standards and effectively guarantees the quality of the formulation.

配方研制秉承了“精品海洋”的设计风格，运用大量的云南优质烟叶，辅以河南、湖南的上等烟叶及填充性的甘肃烟叶，科学的确定各等级烟叶比例，组成叶组配方。再通过对叶组配方的评定检测施加相适应的香精香料，使产品最终达到设计标准，有效的保证了该产品的配方质量。

兰州（硬蓝）