Once iTunes or the App Store is open, if you haven't already, click Sign in and enter your Apple ID username and password. Contrary to what you might think, you cannot simply change the country or region of your account by switching the flag at the bottom of the featured or home page. Doing so will allow you to browse that country's iTunes or App Store selection (see Method 3), but it will sign you out of your account. You will not be able to make purchases. You may be prompted to enter your Apple ID again.  Remember, you may only switch to a country for which you have a local billing address on a valid credit card, or for which you have a local gift card. You cannot switch countries if you don't have either a local credit card or gift certificate. Click Change after your country is selected.  Select the checkbox that says “I have read and agree to these terms and conditions." Click Agree. If you have a credit card, enter it now. A valid local gift card should also be acceptable. Click Continue.

How would you rephrase that briefly using Chinese?
使用你的Apple ID登录到电脑端的iTunes或App Store中。 当你登录账户后，点击右侧工具栏里的账户。 点击账户页面里更改国家或地区的链接。 选择你想要切换到的国家。 当出现iTunes商店欢迎页面后，点击下一步。 阅读并同意苹果的条款和隐私政策。 输入一个有效的支付方式。 输入与你当地信用卡关联的账单地址等信息，然后点击下一步。