I recognize that this is anecdata but I worked together remotely with a engineers from the Shenzhen area a number of times, and they would have a 2 hour lunch plus a 2 hour afternoon nap (under their desks, on a couch, anywhere really) every day. Working from 9 to 9 sounds less heavy (and more fun!) that way.
Maybe I met some lucky few, but if my impression of Chinese tech working culture is accurate, it's less insane than popularly reported.
Maybe I met some lucky few, but if my impression of Chinese tech working culture is accurate, it's less insane than popularly reported.