BL In Salma, you can learn skinning/making hides/tailoring/jewelry/engineering/mining/herbs/alchemy/enchantment/forging.

LM is in the fort of glory, the content is the same as above

First aid is at the Falcon post in Hellfire Peninsula (buy books) (BL can learn, LM doesn't know)

Fishing (buying books) by the lake in the senario Expeditionary Force camp in Zan Gamache.

Hotel owners in Salma learn to cook (buy books)

The goblin project is in area 52, and the dwarf project has a transmitter outside the LM camp in Feng Daoshan (BL can also learn, but be careful to guard it).

There are also tailor trainers in Shacheng slum, which are divided into three types: dark/magic/moon cloth.

After alchemy reaches 375 skills, you can go back to Salma/Rongbaobao to find a trainer to continue your specialization. There are three kinds of alchemy specialization: potions/potions/touches, with their own follow-up tasks.