You may be overthinking it. Your resume and job information on the application should reflect you were employed with this company between 2004 and 2008. If you are admitted and the background check company asks or you provide W-2s that will also support 4 years employment. If your job role changed between part and full time or you have space on your one page resume you may decide to split that job into two resume entries. One for the part time and another for the full time, this is also a good opportunity to show increases in responsibility if applicable.
Thank you for such a quick reply! I AM considering this issue seriously because I'm just taking the first step forward~ Cannot endure any trivial that may ruin my future... ^_^
I know an increase in responsibility means career progress.
The situation might be a little more complext: My first employer is almost dissolved due to improper operation. Can you suggest what I can do if the taxation payment history is not available? Meanwhile, founder of my first employer who recruited me there was "fired" from that company and recently founded another firm. Can I rely on that guy for future possible background check?