No lawyer can guarantee the result of a case. Actually, based on what your posted, you may not even have a case.
2,案情输掉不收取任何费用。若案情赢,我将把我得到的15%至20%付给律师(我认为我的案情起码能得到1百万至2百万的赔偿)
The industry standard is 1/3 of the damage. So 15-20% is way too low for any reasonable lawyer to accept your case on a contingent basis. "At least 1-2mil damage?"
My advice: Go get a life.