Dear Xiao Dong,
I am very sorry that I was out when you came to see me yesterday afternoon．The fact is that I had an en-gagement with some friends,and I was ignorant of your visit．Not until nine o' clock in the evening did I come back．You must have been disappointed by my absence．
I hope you will not leave the city this week．I' ll call you on Friday afternoon at five o' clock．As this is the first time you come to Beijing,I will take you to some places that may interest you．
Please wait for me in your hotel at the appointed time．
Yours truly,
Liu Ling
