Native English Tutor needed

I am from China as visiting scholar at Stanford University for 1 year . I am looking for a English language tutor.

Location: Stanford campus.
Hours: 2~3 times a week and around 2 hours each time. Negotiable.
Tutoring forms: You can choose your tutoring schedule and forms.

Payment: around $20/hour.

Requirement:
Stanford student/postdoc/faculty/staff
Native English speaker
Active, passionate and easy-going
One-on-one tutoring preferred

I can teach you Mandarin free if you like.