the cannabis plant has different kinds of by—products, depending on how it's grown. the main difference is the thc level, the psychoactive compound that causes a user high. hemp has almost no thc and can be grown as an industrial crop for things like textiles and bio fuels. marijuana, on the other hand, has a high thc level, and is considered a controlled substance. last summer, struggling with job scarcity amid the pandemic, hundreds of chinese workers left traditional immigrant enclaves in california and new york to find work in the cannabis boom. irving lin made his fortune in california real estate. he saw the business potential in the green gold rush and helps connect asian american business people with investment opportunities in marijuana cultivation.