回複：誰能告訴我快速往國內寄美元的辦法嗎？ 多謝了！！

use wire transfer from your own bank to any branch of Bank China in China.
Any bank in USA can do that. Just ask your bank. You'll need and the account number in China. You 'll have to choose a transfer branch of bank of China in New York city or LA. Your bank should know this.
Fee: about $30 , no upper limm