Someone on the recruitment team reached out to me. I proceeded to interview, 3 rounds. Second round was with their technical lead, and what threw me off was that half of the interview was conducted in Mandarin Chinese. I was not aware that this was a requirement. I thought it went well. After passing the second round, the next one was with their Director and someone from HQ. That was also conducted in Mandarin. Upon completion, there was a generic rejection email from their ATS. When I asked for some feedback, the recruiter ghosted me. Wish they should consider applicant's time a little more, and clearly define job requirements for candidates.