HR did a good job and establish the whole recruitment process. However, I didn't get the interview outcome although I knew I cannot pass the interview and receive the offer. Besides, I went through so many different companies' interviews, this is one of the good hiring managers (Kapxxxx) I met, I felt very comfortable even though I struggled to come out with a solution. He gave me a lot of hints, till the end my solution was not perfect and the time was up, I need to give up. At end of the session, he even offered a mock interview. I was really touched by his offer and requested a Linkedin connection. PS: can google more understand about "Pay with QR code"