Upvote:1
When inputting your info into the IATA Travel Centre tool it spits out the following:
Document: Nepal Passport
Itinerary: Kathmandu-Chengdu 22 MAR 1545-2100 -> Chengdu-Melbourne: 23 MAR 0130-1520
So it seems that TWOV is allowed as long as it happens within 24h (not 1 calendar day).