Hi Rinku
Greeting from Peggy, Top China Travel.
Sorry we have no office in Kathmandu, and we have no the recommended travel agency resource at present.
We also can offer you the Hangzhou tour booking service but we may need to know more information about your tour in advance:
How about your exact travel date?
How many days you plan to travel in Hangzhou?
Do you want us to book the hotel? If so, how about the hotel star? 3, 4, or 5 star?
How many people will travel together?
One more thing should let you know that we may need to charge before your arrival. So if you plan to book with us, earlier paying will be appreiciated.
Best Regards
Peggy
Top China Travel