英语底子差，不得不又来求助于大家了。

请大家帮忙理解这几句。谢谢了： i am intending to help you a bit. sorry that i am not able to promise you anything concretely (originaly the meaning is from czech "to promise somebody something "on the concrete"" :-d )i will see, what could be the margin to share with you. techically it is no problem, just to sign a purchase agreement and you he to check and advise your limitations if any. after my next visit of china i will ask you (as a reciprocal service) to order for me in a restaurant e.g. fried scorpions to not get e.g. matches and to die of hunger, please, please. i guess, unfortunatelly, that there will be small space, so do not expect to be able to purchase illa after the first shipment of sbr, but who knows, surprising or a miracle could happen even though these usually do not take place. be sure i will do my best.