Conversation so far:
where does caffeine come from in energy drinks?
The majority of caffeine is now made in China with 3 Chinese factories together exporting 4 million kg of caffeine alone to the USA every year.
where in China is the majority of caffeine is made?
the majority of the world’s synthetic caffeine comes from just one Chinese town: Shijiazhung
what is the largest caffeine factory in China?
CSPC Innovation Pharmaceutical Company is the largest caffeine factory in China.
how much caffeine is being produced at CSPC Innovation Pharmaceutical Company in Shijiazhung, China?
It produces 1.8 million kg of caffeine for the US market alone.

Question: how much documentation is available on the industry?
Self-contained rewrite: how much documentation is available on the caffeine manufacturing industry?