出国旅游英文证明书，求专业回答。高分悬赏在线等答案

to American embassy：

Mr. Yang Gaiyu，who was born on 1958.11.13, is working as Vice General Director in our units. His monthly salary is about 8000 RMB. He has been allowed for a leave to visit America in Jan. and Feb. 2008.

We want to ensure that we will keep his position during his visit in Europe. We also guarantee that he will come back to china and continue to work in our units after he returns from Europe.

Name: China Telephone Directory Corporation Shandong Branch

Add: No.52 Jingsan Rd. Jinan City

Tel: 0531-86260016

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