DEAR SIR,
*** is a certificate from an authorized governmental organization in China prescribing the visa validity, number of entries and stay period. The company/institute/company in China which invites you can apply this certificate for you in the Ministries and Commissions of the State Council, the Government of all Provinces, Autonomous Regions, and Municipalities directly under the Central Government, and Foreign Affairs Offices and Bureaus of Economy and Commerce hereunder, and departments and units recognized by the Department of Consular Affairs of the Ministry of Foreign Affairs of the People’s Republic of China.

***My office is Yiwu,zhejiang. me and my translator already checked with many place for apply Visa Notice Sheet. but we cant find the right department. can you check in internet or other way and give me this department's address and tellphone number in yiwu zhejiang.
***After submit all this paper to china embessy in bangladesh,then can my wife get long time visa? like me? or only one month turist visa?