The first is personal temperament. I can't describe your temperament in detail, but your personal temperament can make you feel special at a glance. There are many ways to improve your temperament, such as reading, practicing calligraphy, doing sports, traveling, learning some musical instruments, and enriching your mind and brain with poetry and books. Your temperament will naturally come out slowly.
Pay more attention to your clothes and overall collocation. If you want to be exquisite, you should prepare some cosmetic facial cleanser or something. Do a hairstyle and keep it good every day. Don't forget your tie, watch and shoes when you wear a suit. It must be clean, and the clothes can't be stained.
You must be confident, calm and not frivolous when you speak. If you are competent enough, you can add some humor. (This can refer to Sa Beining and Zhu Guangquan. )