Trunghongmon,Daygan,
yes, they grow well in the tropics. My first tree is heading into 30 years of age.
Seed was a gift from Japan, and my second oldest tree, from seed, came from the U.K.
All of my other seedlings are from Japan, through Bonsai Boy on Amazon.
Many trees coming from Guangzhou, grow well down here.
Trunghongmon, your seedlings look great!
Our temperatures are only to 33 deg.c and that lasts for an hour or less, than it's back down to 22 deg.c or so.
For October to February we go lower to 30 deg.c by day and 18/19 by night.
The low temperature for these months is longer than the high.
I apologise, I cannot speak Chinese only sad English.
Good Morning.
Anthony