A wild guess. The information held by local government for my household is not completely correct. I need to go to the local civil affairs department and provide the relevant evidence to have the information corrected. ... and have the certificate reissued?

OK: ...........i have already applied for - OK........................... my household register <---No idea what this means..................in china. <--OK ...............I want to apply ( for what?) to australia ,but informations <--- information is collective. no"s" ..................of my household <-- No idea what household information is.....................is different from fact...<-- is false? Is not true? NO idea what you mean. ..............., I need open a certification <----- No idea what this means. "open" is not used with certificate. <----------in local civil affairs departments <--- no idea what this means ......................... thank you for your replying,before i apply for a visa, i need --- OK ..............open a certification <--- no idea what this means....................... for my personal informations <--- ,but my informations of household register is different from fact, "different from fact" = wrong? incorrect? ...................... Ask this where Chinese will read it? It seems you are asking about how to do something in China. It seems you must fix something in China, first.

thank you for your replying,before i apply for a visa, i need open a certification for my personal informations,but my informations of household register is different from fact,

Are you talking about applying for a Visa? I'm a little unsure what you mean exactly.