Some companies or institutions organize some such trainings. I think if you want to have the opportunity to receive training in such a company, you must be advanced.

The following is a passage I found on the Internet:

The "Siquande Lighting Technology Training Course" sponsored by Siquande Lighting Asia Co., Ltd. and Siquande Lighting China Office and co-organized by Guangzhou Hedong Electronics Co., Ltd. was held in Guangzhou. Representatives from nearly 50 domestic dimming equipment manufacturers: Hedong Company, Tianying Company, Zhejiang Dance Research Institute, New Stage, Siquande Lighting Beijing and Shanghai representative offices, as well as engineering and user units in Guangzhou received training.