Beijing is 2.25 hours ahead of Kathmandu
Best overlap: 8:45 AM to 3:45 PM in Kathmandu is 11:00 AM to 6:00 PM in Beijing.
Shoot for 8:45 AM to 3:45 PM in Kathmandu; your Beijing colleagues will see that as 11:00 AM to 6:00 PM. Beijing is 2.25 hours ahead of Kathmandu, but you'd hardly notice — 7 hours of shared hours makes this feel like working in neighbouring time zones.