As global regulatory measures for e-cigarettes continue to improve, more and more countries and regions are gradually including e-cigarettes in the category of tobacco products for management. Especially in the United States, the world’s largest e-cigarette consumer market, it was the first to classify e-cigarettes as tobacco products through the revision of relevant legislation, providing important reference value for the development of relevant laws in more areas. It seems that the ultimate destination for e-cigarettes can only be tobacco companies, which is also a kind of “return to the roots.”