How much does it cost to travel from Xuzhou to Hong Kong?

Hehe, I have a three-day tour ticket for two people in Hong Kong, including food and accommodation. I won it by participating in school activities last semester. 65438+ expires at the end of 2003. Only the air tickets from Xuzhou to Shenzhen need to be paid at their own expense, and the rest don't need to spend money. Because I am a student, and I can't afford the expensive plane ticket to go with my girlfriend, so I have kept it. If you are interested, I can give it to you.