英语求职信开头称呼怎么写

april 13,2000 room 212building 343 tsinghua university,beijing 123454 ms.yang：
i was referred to you by mr.zhang,a partner with your beijing office,who informed me that the shanghai office of your company is actively seeking to hire quality individuals for your auditor program.
i have more than two years of accounting experience,including interning as an auditor last year with the beijing office of cccc.i will be receiving my mba this may from tsinghua university.i am confident that my combination of practical work experience and solid educational experience has prepared me for making