There are many kinds of technicians in society now.
Such as automobile maintenance technician, electronic technician, engineering technician, bricklayer technician, plumbing technician, chemical technician, refrigeration technician, home appliance maintenance technician, beauty salon technician, mechanical fitter technician, industry and trade technician, e-commerce technician, numerical control technician, etc.
In addition, there is also a "floating cabin" massage, which involves yellow, and some people in it are called technicians because ta has "technology".