Stay in Guangzhou for 5 nights

Hi, I am an Australian passport holder, will be visiting Ho Chi Minh (4 nights), then Guangzhou (5 nights), then Tokyo (8 nights) in March 2024. I believe I am eligible for the 144 transit permit without visa in Guangzhou. I have booked and paid for all the flights (different airlines with direct flights) and accommodation in each city. I don't have all my bookings in one itinerary, but have each airline's confirmed tickets and seat numbers. I don't have a visa to Japan as I am qualified for visa free entry. Am I eligible for the 144 transit permit? Will I be denied entry to China because I don't have a visa to Japan and an itinerary for my entire trip?