The name on my passport and single certificate is not same, will it affect the marriage registration in China?

hi,i am marrying in china and we noticed that my name on my passport says MICHEAL PATRICK MURPHY,but on my single certificate it says MICHEAL PATRICK GERARD MURPHY which is how it appears on my birth cert,is this a problem for us?or is just important that the first name MICHEAL and the surname MURPHY are the same on all documents?,hope someone can help