Please help ! Working visa advice & info

Hi ,
I wonder if anyone could help me in this ,
I just received a job offer , and it's stated that I have to do many things like contacting a lawyer firm to process my visa ,
It's an employer who suggested me to contact one famous lawyer firm , and they gave me details
Is it correct that :
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In compliance with the immigration and labor laws of Hong Kong Special Administrative Region (HKSAR) of the People's Republic of China (PRC), which stipulates that all foreign employees must obtain Foreigners’ Employment License under the General Employment Policy (GEP). In view of that you are required to contact the below certified immigration attorney for their services in procuring Foreigners’ Employment License on your behalf. Remember this is mandatory as your visa and work permit cannot be process without this License. Find below the contact details of the immigration attorney.
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Please help , is this seems as real job offer or fake one ???
Is this right that I should contact a lawyer firm who assigned by the employer ??
How much approx fees for this ( range ) ??

Please help