1, don't ask for the number when there are many people, it will be embarrassing.
2, you can choose to chat up when you are about to get off work, just say that you want to buy cold medicine and help recommend it.
When paying, I can honestly say that I don't have a cold, but I have been here several times and I have been paying attention to you for a long time. I really want to know you (smile). If possible, add you a WeChat.
4, don't ask questions, ask if you can add a WeChat.
5. I wish you success