Can I bring vape mod and juice onto airplane?

Carrying electronic cigarette devices and e-liquid on a plane boils down to one simple rule: The devices must be carried with you, the e-liquid must be carried in a regulated manner, and use and charging are strictly prohibited throughout the journey.
Below are the specific regulations of China's civil aviation and international standards. We suggest that you take one minute to review them to avoid any delays at the airport.
⚙️ Equipment Section: Must be carried with you
Prohibited from Check-in: Both the equipment and the spare batteries are strictly prohibited from being placed in checked luggage. Because the built-in lithium batteries in the equipment are difficult to handle if they catch fire in the cargo hold.
Must be carried with you: Can only be carried on your person or placed in your carry-on luggage.
Protect the battery: Ensure proper insulation (such as sealing the metal contacts with insulating tape), and prevent accidental activation.
Quantity and Capacity: Reasonable quantity for personal use. According to customs regulations, the duty-free limit for inbound passengers is 2 tobacco products and 6 cigarette cartridges (or combined products); the rated energy of lithium batteries must be ≤ 100Wh.
?? Wax-based oil section: Liquid regulations must be followed
Packaging restrictions: Each bottle should be no larger than 100ml; all small liquid bottles can be easily placed in a resealable transparent plastic bag with a capacity of no more than 1L, and each person is limited to 1 bag.
Carrying method: It can be carried by hand or checked in as luggage.
Prevent leakage: Due to changes in cabin air pressure, please make sure to tighten the bottle cap and place it in a sealed bag to prevent liquid leakage.
?? Usage Section: Strict Prohibition Throughout
Absolute Ban: During the entire flight (including takeoff, in-flight, and landing), it is strictly prohibited to use devices or charge them in any area of the cabin or in the lavatories.
Reason: It will trigger the smoke alarm, seriously endangering flight safety.
⚖️ Legal Section: Pay Attention to Entry Restrictions
China Customs (Entry): Tobacco products are restricted items for entry into the country. Passengers can carry 2 electronic cigarette devices and 6 cartridges (total liquid content ≤ 12ml) duty-free when entering the country; for those from Hong Kong and Macao regions, the limit is halved. Any items exceeding the limit must be declared voluntarily; otherwise, they may be seized by the customs.
Destination Laws: Some countries/regions (such as Singapore, Thailand, India, etc.) have strict import bans on e-cigarettes and e-liquids. Carrying them may result in hefty fines or legal sanctions. Before traveling, be sure to check the customs policies of the destination.
The specific rules may vary slightly among different airlines. The safest approach is to check the regulations on "dangerous goods" or "prohibited items" on the official website of the airline you are flying with before departure.