Thank you abc_n_xyz. I did find more info regarding that. Ah this point I know that Nepalese with valid US visa dont need visa in HK. However, as in my case if I dont have valid visa I need to show cathay pacific the proof of residency in US. Now my next queri is what do Cathay and HK honor as proof of residency in US. I will have my I-20 and Driver's license during the flight but I need to find out what other document can I prepare to give to Cathay Pacific in advance so that my travel will be easy.