Found photos of Bytedance's open office:
empty: https://officesnapshots.com/2016/07/13/bytedance-offices-bei...
full of staff: https://www.caixinglobal.com/2020-04-22/bytedance-drops-payw...
with a faux ceiling: https://www.livemint.com/companies/start-ups/tiktok-parent-e...