Iran is an Islamic country, and any foreigner must abide by some taboos of Islam.

In addition, it should be noted that all ethnic groups in Iran have the habit of not giving a thumbs-up when praising others, which Iranians think is unsightly behavior;

Don't talk loudly or in public places, don't spit everywhere, don't pick your nose in front of people, and don't send fruits to Iranian homes, but flowers and handicrafts from China are very fashionable.

Iranians are hospitable and like to make friends with foreigners, especially China people. Under the condition of observing the above taboos, foreigners can freely associate with Iranians and make friends.