Finally I can focus on my research. I used most of my time in doing other jobs, live is about programming, debugging, deploying, etc. All about gained more experience but also took my time. I been question myself why must make myself so hard, it's about money or to pass the time? None of them, I don't worry about finance, also the time left actually limited. So why!?
P.S. I'm sure that every time I ignored my research for couple of weeks, I'll feel fresh and been motivated while I look it back. Ha ha, is it interesting?