if i marry a chinese girl then can i get chinese nationality?

States/Provinces

my nationality is bangladeshi , if i marry a chines girl then can i get chinese nationality ?
and how many days or mounth will take for this ?
and where to submit these papers?

Are you going to give up your nationality of Bangladesh? Because China doesn't allow dual nationality. What's more, the procedures of joining Chinese nationality is very difficult. Most people were refused. However, if you are going to marry a Chinese girl, it would be easier. You should have a document that the embassy of your country provides to prove that you are unmarried. And you should have a valid passport or other international travel documents.

More info:

Travelers' Voices on Dual Nationality: Page 2

While the process of getting your paperwork together can differ from nationality to nationality, there are two important documents any foreigner will need to get in order to get married in China: a certificate of marriageability and a certificate of marriage.

Note: Same sex marriages are forbidden in China.

The first thing that any foreigner needs to wed a Chinese national in China is a certificate of marriageability. The certificate is proof that the applicant is not currently married, a fact reflected in the Chinese danshenzhengming (单身证明), which literally means “single certificate.” A certificate of marriageability is obtained from your government, usually from an embassy or consulate, and then presented to the Chinese government upon application for a marriage certificate. One thing to bear in mind when getting a certificate of marriageability is that you must present a copy translated into Chinese to the Chinese government when applying for your marriage certificate. Some countries, such as the United States, provide a bilingual English/Chinese certificate, but if your embassy/consulate does not then you must obtain a notarized translation from a Chinese government office.

In general, if you are applying for a certificate of marriageability in China it is important to remember to bring the following items when applying at your embassy/consulate:

• your passport.
• notarized proof that any previous marriage has been terminated.
• your partner’s national ID card, or shenfenzheng (身份证).
• your partner’s hùkǒu (户口), or residency permit, which every Chinese citizen has.
• your partner does not need to present their passport, but if available it may help to bring it to speed up the process.

To get more information about the marriage in China please visit:

Marriage in China - Wikitravel