A simple sentence "Hello, senior!" Or "hello, sister!" , can close each other's psychological distance. When you ask them questions, you should ask others in a humble tone. If you are overbearing, it is estimated that you will be hacked immediately. After asking the questions you need to ask, remember to say "thank you" sincerely! To those seniors and sisters who patiently answer your questions. It is never an obligation for others to help you, so please don't feel at ease to take other people's free gifts.