Some colleagues always make fun of me.

Don't get too excited, just wave your hand every time, and tell him with a calm smile that it was a joke before. After a long time, he naturally got bored.

If he can't do it again, and he believes it, then steal an opportunity to tell him that nothing should be calculated indiscriminately, because fortune telling is a secret and will be a blessing, and even the best luck can be slowly folded, which is very serious.