"Xiaoyu, your letter!" Tang Yu hasn't got up yet. Suddenly, I heard Wu Xiuhua's voice.

"Oh, good!" Tang Yu responded, thinking that no one had sent a letter to him for many years. Who would send it to him now? Tang Yu quickly put on his clothes and opened the door.

"The letter is on the table. Look for yourself." Wu Xiuhua was making breakfast and pointed to the table.

Tang Yu looked at the dining table and picked it up quickly. There was only an address on it, but there was no sender's name and address, and it was printed out. Tang Yu wondered, if it was sent by...