The leader gave me a red envelope on the Dragon Boat Festival, saying it was for my exclusive use. Don't tell others whether I should accept it or not.

You shouldn't accept it. First of all, analyze the purpose of red envelopes: first, reward, second, gratitude, and third, ulterior motives. For the first two reasons, a good leader will give you money in public or through bonuses, so giving money privately is not a good choice for a leader. The last one is ulterior motives, which is even more worrying.

If the leader thinks you are doing well, he will expect others to do as well as you. If you choose to give you a red envelope in an open way, it will inspire more people to do a good job.

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If it is sent privately, it will give people the impression that the leader has only made some minor changes. Don't accept it.

Thank you again. The leader may give you a red envelope in private to thank you for helping the leader with his personal affairs, so giving a red envelope is a way of thanking him.

Giving red envelopes in private has actually deepened your personal friendship, but after all, leaders are still leaders, and leaders have deep personal feelings.

This may lead to the separation of business and private affairs, or the leader may ask you to do more for him, so he won't accept it. Finally, there are ulterior motives, and it is best to be vigilant about matters related to interests.