As for nic with juice I have decided to order from healthcabin in China (because I will be there) a wide range of PG/VG ratios with various nic strengths so I can identify my sweet spots in these areas.
Most new vapers begin with a nic level of 18 or 24 mg.
Juice Components
Flavoring usually about 10%
PG enhances flavor, TH and lung hit- water like
VG= vapor and can mute flavor- thick
Nicotine- TH, lung hit and our need for nicotine. The MOST important ingredient in regards to TH and lung hit.
Standards in the industry are 80/ 20 or 70/ 30 PG/ VG. I vape 60/ 40 PG/ VG.
A very small percentage of vapers have found they are sensitive to PG. Some manage to get by with a high VG/ low PG ratio while a very few have to vape 100% VG and add either distilled water or PGA.
Seeing as you're going to be there awhile I would suggest you first purchase sample packs or small bottles because there will be juices you absolutely HATE. Most tobacco juices will need to be steeped. A quick steeping method:
Day one place bottle in hot tap water for 45 mins. Place in cupboard.
Day two a.m. open bottle and place back in cupboard.
Day three try vaping.
Also be sure you purchase an atomizer or two as you will want to test your new juices before committing a cartomizer or clearomizer to it. Much easier to clean.
Dekang juice is highly regarded in the vaping world and HealthCabin EJuice contains none of the dangerous chemicals sometimes found in EJuice.
As far as Dekang tobaccos I enjoy RY4 (HealthCabin brand), 555, Flue cured tobacco and DK-TAB and although I HATED menthol analogs I really do enjoy a touch of menthol in my tobaccos. You can buy menthol drops separately and add accordingly.
If you're having sleep related issues try vaping a lower nic content in the evening. Also be sure to drink lottsa water as vaping dehydrates and can ruin the vaping experience. The vapor comes from our bodies and not the juice. I drink 1 1/2 liters of water per day. Also in some very rare cases (myself) some are allergic to the sweetener Ethyl Maltol aka Cotton Candy. Chances of this happening are very rare though and other substitute sweeteners can be used.
Good Luck and have a great trip and please keep us updated.
Cheers.
P.S. HealthCabin has some great sales but none right now. Here's a discount code for 5% off:
ECF