wasinc first hand experience
yes - the owner of wasinc is a good talker and will tell you lots of nice things to make you feel warm and fuzzy. unfortunately they don't have the track record to follow through with all the promises they make and have a history of cheating people given the opportunity to get away with it.
they appear to be a nice friendly us company but actually your contract will be with a hong kong shell company they use to funnel money through.
take it from somebody who has been here long enough to have been personally stiffed by wasinc and met many other pilots in china who also got unfair treatment from wasinc. they pretend to be on your side but actually they are not and will leave you hanging and broke. ask around when you see other pilots at your medical check or interview or go down to some bars in shekou shenzhen where all the shenzhen pilots hang out and ask for some stories about wasinc.
you have been warned... there are other choices out there and any company that tells you that "they are the only one that have this contract" are lying - there are many other contract agencies recruiting for every airline and charter company in china. wasinc will collect between $500-$700USD per month as a service fee from the airline for recruiting you. they say they will provide service and support but actually in some cases they will steal money that is owed to you saying the airline never paid them. some foreign pilots are going directly to chinese companies now without a middle man scammer to steal money from you. whenever you have a question about pay or anything wasinc will direct you to the airline anyway so they are useless.
my recommendation - if you are interested in any job in china - search for that job and you will find several other agencies recruiting for the same job. then do some research on the recruiting agency. once you goto china you will be locked in and can't freely change airlines. if you end up stuck with a deadbeat recruiting company like wasinc you won't be able to freely "change" to fix your mistake.