You can go to the local DMV or Public Safety Department (i.e., the office which issue driver license) to get a copy of your driver record. If you have violation of traffic on your driver record, then report it in N-400.
护照上日期好像入出境时间对不上
-Review your passport for entry/exist stamps from China. Difference of a few days does not matter.
You may also check your flight records from the airlines website or APP.
Another choice: To get your exact oversea travel history, you can request it with CBP via FOIA which may take several months. See this link:
Request Records through the Freedom of Information Act or Privacy Act | USCIS
