越来越多的外国友人喜欢来中国旅游。假定你是李明，你的美国笔友戴维是一个中国迷，他想来中国进行深度旅游。请你阅读他写给你的邮件，并根据邮件内容及你对中国的了解用英语回复。
To: LiMing@china.com
From: David2022@usa.com
Subject: Travelling in China
Dear Li Ming,
How are you these days? As a fan of China, I’m thinking about a trip to China during the summer holidays. Would you please tell me the following things?
● Which city in China is most worth visiting? Why?
● What is the best way to travel between cities in China?
● What gift can I buy for my friends?
I’m waiting for your valuable advice!
Best wishes!
Yours,
David
要求:1.词数90左右;
　　　　2.须包括所有要点,可适当发挥,使短文连贯、通顺;
　　　　3.文中不得提及真实的人名、校名等相关信息。

四、(略)