i sent him an email that i would like to return this and get a replacement, here is the answer that he sent me back
''as replacement, as we told you, machine was ok when we tested here in china,long distance transportation may cause varies kinds of problem, but this should not be undertaken by us,besides, these are all not big problem, but can be all solved, so we do not agree to return, please cooperate with us to solve the problem.''
they are joke
don't know what to do.