The tobacco leaves used in 兰州（软飞天） feature two distinctive characteristics: first, a multi-level procurement system that carefully selects the finest tobacco leaves from high-quality raw material bases across the country, complemented by imported premium tobacco, ensuring top-notch quality from the source; second, 100% hand-selected leaves, meticulously chosen according to the formula's requirements, guaranteeing absolute purity and stability in every pack of 兰州（软飞天）. 甘肃烟草工业 implements a dual approach to reducing tar and harm in the 兰州（软飞天） formula, addressing both physical and chemical aspects. For physical tar reduction, an innovative 30mm coaxial "five-star" dual paper composite filter tip technology is employed; for chemical tar reduction, the rich natural plant resources of the Northwest are utilized, employing various extraction methods such as spectrophotometry and thin-layer chromatography to select unique flavor-enhancing extracts suitable for 兰州（软飞天）, effectively solving the issues of flavor enhancement and aroma. 甘肃烟草工业's unique processing technique, characterized by "plateau maturation, vacuum rehydration, tobacco leaf input, and thin-layer drying," allows tobacco leaves from across the country to undergo different treatments in the dry plateau environment, achieving the goals of volatilizing impurities, enhancing moisture, complementing advantages, and highlighting the natural aroma of tobacco. This ensures that the smoke from 兰州（软飞天） is rich, natural, and distinctly sweet, showcasing the prominent and stable characteristics of its smooth flavor profile. The integration of 甘肃烟草工业's technological advantages of "low tar, low harm, high technology, and high comfort" represents a new height. By combining high-end raw materials, refining the formula, and innovating with new flavorings derived from Northwest desert plants and marine organisms, the craftsmanship of the "smooth flavor" style is perfected, reducing tar to 6mg per cigarette while ensuring an enjoyable experience of the "smooth flavor." This allows for a luxurious lifestyle with minimal bodily harm, beautifully embodying the essence of "low" in a way that transcends the tangible into the intangible heights of enjoyment.

（一）多级采购 手工选叶 质量支支上乘 兰州（软飞天）的烟叶选用有两个方面的特色：一是多级采购，通过甘肃烟草工业遍布在全国各地的优质烟叶原料基地精心选取最优质烟叶，辅以进口优质烟叶，在源头上保证了原料的高品质； 二是100%纯手工选叶，根据配方的要求，兰州（软飞天）的烟叶全部通过手工选取，以保证每一包兰州（软飞天）的烟叶都有绝对的纯度和稳定性。 （二）组合配方 理化同步 组合降焦更绵香 甘肃烟草工业从物理降焦、化学降焦两个层面实施兰州（软飞天）配方的降焦减害工作。在物理降焦上，创新采用了30mm同轴心“五星型”二元纸质复合滤嘴技术；在化学降焦上，从西北丰富的天然植物资源入手，通过分光光度法、薄板TLC扫描法等多种提取方法，选择适用于兰州（软飞天）特有的增浓、增香提取物，成功解决了卷烟的补香、增香问题。 （三）特色工艺 自然烟香 润泽心田 甘肃烟草工业以“高原醇化、真空回潮、烟丝投料、薄板烘丝线”为特色的绵香风格加工工艺，可以使来自全国各地的烟叶在高原干燥的环境中得到不同的处理，以达到挥发杂气、增加润泽、优势互补、突出烟草本香的目的；保证了兰州（软飞天）烟香醇和自然，回甜明显的绵香风格特征的突出和稳定。 （四）低，是一种新高度 系统集成甘肃烟草工业有限责任公司的“低焦油、低危害、高科技、高舒适度”的技术优势；整合高端原辅材料，精细组合配方，精萃西北沙漠植物、海洋生物等新型香料研发等创新成果；融会“绵香”风格集大成工艺，使焦油量降为6mg/支的同时，确保“绵香”风格的享受度；在使身体损害更小的情况下，完美体验尊享生活高贵意趣，以有形之“低”，诠释无“形”之高。

兰州（软飞天）