I have received a response from Line Tutors based in Hong Kong.

http://www.linetutors.hk/

TEXT EMAIL

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Hi There,

Please let us know if you or your friends are interested in the following
job opportunities:

.... [job offers]

*Handling Fee charged by LINE Tutors: 15% of the total income of the first
month (one time).*

Please send a recent picture and a CV to linetutors@gmail.com /
info@linetutors.hk by reference quoting (e.g. case# 011), if you have valid
working permit, and most importantly, if you agree with the charge. For
inquiries, please contact Lionel Lam @ 852- 9752 4893 or Lee @ 852- 6168
2912.

All personal data provided by applicants will be treated in strict
confidentiality and used for recruitment purpose only.

Thank you for your attention!

Best regards,

Lionel Lam

....

--
LINE Tutors - Linking Institutions n Expertise Tutors
Website: www.linetutors.hk
Facebook Page: www.facebook.com/linetutors.hk
Contacts: Mr. Ricky Ng@6168 2912/ Mr. Lionel Lam@ 9752 4893.

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++

TEXT END

I am wondering if anyone else had dealings with this firm.