Hello and welcome to the forum
@XiaoCaiHong. Glad to have you here!
Another set-up you could look at is the
Kanger Subox Mini Kit <= Video Review
If you live in a country where vaping is banned this kit give you the option to build your own coils (using the RBA base) and not have to try and source factory coils.
You would also need to get a good 18650 20A battery (like the Samsung 25r) and a good charger. Get the best charger that you can reasonably afford. Statistically most battery incidents occur while charging.
Pila,
Xtar, and
Nitecore Intellicharger are the most recommended brands.
_________
If you are interested in learning more about e-cigarettes (and all the parts and pieces) below are some blog posts by
ECF member
@Baditude that I highly recommend for someone new to
vaping.
Here are a few more links from
New Members Information <= Link covers many topics. Here are two of them:
1.
The Three Main Types of Ecig
2.
Vaping Slang and Acronyms
Nicotine
A "general guideline" for nicotine concentration in e-liquid to the number of cigarettes smoked per day. If you are subohming (resistance under 1.0Ω) cut these nicotine levels by at least 50%.
06 mg = 10 cigarettes or less
12 mg = 20 cigarettes
18 mg = 30 cigarettes
24 mg = 40 cigarettes
eLiquid/Juice
PG = Propylene Glycol - the "flavor carrier" of e-liquid. A secondary source of "throat hit", but not as strong as the nicotine concentration. Some people have a sensitivity or even an allergy to PG. It's very thin.
VG = Vegetable Glycerin - the "vapor maker" of e-liquid. Used as a sweeter in many food sources, and also as a skin emollient. It's very thick. Often labeled just "Glycerine"
PG and VG are often used together in different ratios in e-liquid. For example, a 50/50 PG/VG ratio. Some juice vendors offer a range of different ratios as far as PG/VG.