Golden Bridge Translation & Notarization for China Visa Application: Purchase our online proxy service, simple, secure, and fast. I Need Proxy Service: 1. Application Form 2. Recent passport with one photo attached 3. Contact phone number, email address, visa type (single, double, multiple entry) 4. Original passport and copy of the information page 5. Invitation letter (inviter must be a Singapore citizen aged 21 or above, permanent resident, or a Singapore-registered company) 6. Round-trip flight tickets and itinerary 7. Original U.S. Green Card or valid visa 8. Proof of employment 9. Copy of Singapore contact's ID card.