z visa ,mr radison hired me on job in bejing china, but he demands me money 200$ for immigration fee

hello sir/madam
i am applying a job in gulf news for shop assistance ,he select me and hire me on job after 20 email conversation. but at the end he send to me contract letter or receive to my scaned passport copies .after he demands to me 200$ money for immigration fee or or with deposit slip is proof you send a money for that fee. i am not able to pay the money. his last email to me .

"i am sorry because the immigration needs to see the proof of payment on your names that is why. i can only help you out you will have to come up with $100 and send us the receipt of payment i will ask my wife to help."

please inform me what are the rules of china employment entry permit? is immigration fee necessary to pay by employee,or if any other option to proceed this mean from pakistan. i many visit to dubai or also work there, he said his wife is in china consulate,

kind regards,

Murtaza malik
pakistan