Do I need to Change my marraige name to my Chinese Passport

I was born in China, my parents are chines, grown up in Bangkok, Thailand, now I live in the US with my husband. Do I need a visa to China?. I would like to visit my grandfather, who is over 90 years old.
My Chinese passport has my father's last name. Now I am using my husband's last name. Do I need to Change my last name is the passport?