Can I get married with L visa?

I am going to get married in this March. I took a L type showing business purpose and latter I applied for single certificate what now required to be motorized also by Chinese embassy located in Daha, Bangladesh what I didn't know. Now I m afraid of going to Chinese embassy bcoz I showed different reason to obtain L type. I m afraid of mine to be revoked. In this case, can I noterized my single certificate from Bangladesh embassy located in Beijing instead of Chinese embassy in Dhaka, Bangladesh? It will be very helpful if anyone can tell me what should I do?