How to distinguish between genuine and fake THC e-cigarettes

I. Drug-Attributed Electronic Cigarettes (Containing Synthetic Cannabinoids)
‌Difference between appearance and promotion‌
Name indication: "Top-level electronic cigarettes" often imply hallucinogenic or stimulating effects; ordinary electronic cigarettes do not have such publicity .
Packaging labels: Regular electronic cigarettes must indicate ingredients and production license; drug electronic cigarettes often have no clear labels or use false labels .
‌Component testing‌
Synthetic cannabinoids: China has completely banned synthetic cannabinoid substances. Electronic cigarettes containing such components are classified as drugs.
THC content: If the tetrahydrocannabinol (THC) content in the e-liquid exceeds the limit (China stipulates that the THC concentration should be ≤ 0.2%), it may involve illegal activities .
‌Sales channels and prices‌
Illicit channels: Often circulated through social media and underground transactions, with prices significantly lower than those of regular products by 26%.
Unlicensed operation: Sales without obtaining a tobacco license are illegal.
II. Counterfeit and Substandard Electronic Cigarette Products
‌Packaging and Technology‌
Printing quality: The packaging of counterfeit cigarettes has blurry printing and uneven colors, and the anti-counterfeiting marks have no gradation changes .
Interface process: The packaging of genuine products is flat and the seams are neat; the seams of counterfeit cigarettes are rough and there are obvious traces of sealing glue .
‌Vape cartridges and smoking devices‌
Vape oil condition: Counterfeit vape oil may appear cloudy, stratified or have an unpleasant smell; genuine vape oil is highly transparent and free of impurities .
Hardware identification: Official smoking devices are marked with the brand, model and safety certification; counterfeit products have ambiguous or missing markings .
‌User experience‌
Taste and smoke: Counterfeit cigarettes may irritate the throat and have a strong smoke particle sensation; genuine cigarettes have a milder taste and finer smoke. 
Burn residue: Genuine cigarette ash is grayish-white and does not easily fall off; counterfeit cigarette ash is darker and easily falls off. 
III. Legal Risk Warning
‌Synthetic cannabinoid electronic cigarettes‌: Both smoking and trafficking constitute drug crimes. 
‌Operating without a license for electronic cigarettes‌: Heating non-burning electronic cigarettes (containing tobacco components) require obtaining a license; otherwise, it is illegal operation. 
‌Summary‌： The distinction should be made by combining visual inspection, the legality of components, and the purchase channel for comprehensive judgment. Consumers should purchase through formal channels and avoid coming into contact with electronic cigarette products of unknown origin.