As someone who has worked in a dev office in Beijing for a bit - no. Devs routinely took up to 2 hours for lunch breaks, and took numerous breaks in a day. I didn't blame them, mind, because the reason was obvious - for most people, it's just not possible to be completely engaged and invested for 12 hours a day, 6 days a week, forever. I'd estimate there was about 4-5 hours a day of properly productive work going on.