What about visas for Iranians coming to Hong Kong?

Iranians with Iranian passports need a Hong Kong visa to go to Hong Kong and a Chinese visa to go to Chinese mainland. He only needs to go to China's embassy in Iran, No.7 13, Naranjistan, Pa Sedat Lan Street, Teheran, to apply for a Hong Kong visa. If he wants to go to Chinese mainland, it's actually the most convenient. When China's embassy in Iran applied for a Hong Kong visa, he also applied for a Chinese visa. After both visas are approved, he can enter Chinese mainland immediately after attending the exhibition when he arrives in Hong Kong, so he doesn't have to waste time applying for a Chinese visa in Hong Kong. If he wants to apply for a Chinese visa after Hong Kong, he needs to apply to the Office of the Special Commissioner of the Ministry of Foreign Affairs of China in Hong Kong at the ground floor of China Resources Building, Harbour Road, Wan Chai, Hong Kong.