Pls correct the specimen Copy of Invitation Letter and give advise

My Chinese Friend wants to give me Invitation Letter. How she can write an Invitation Letter for me to come down in China. Would you kindly correct the specimen copy like below or what more... Please advise.
Nazmul


Jun 29, 2012

The Ambassador,
China Embassy in Bangladesh
Plot 2&4, Embassy Road, Block-1, Baridhara, Dhaka, Bangladesh
Tel: +88-02-8855405, 9862988, 8824863, 9862988-1008
Fax: +88-02-8823004, 0088-02-8858259.
Email: mfa.gov.cn|Chinaemb_bd

Letter of Invitation
Dear Sir,

I like to inform your good office that one of my Bangladeshi friend Mr......is required to visit China. As such he needs to stay in China for (six) days with effect from ................. to ............. I do undertake guarantee to ensure that he will return to Bangladesh after completion of his visit to us.

The Passport details of my friend Mr ............. are as under :

Therefore, I shall be grateful if you would kindly arrange issuance of Single Entry Visa in favour of Mr............... I hereby undertake that I will borne all expenses (if any) including his food & lodging, transportation etc will be borne by me during his visit in China.
Thanking you,

Yours faithfully

Ms .............
China.
Tel:............