Thank you once again, I’m wondering if it is ok to put the plant overnight in my balcony with room temperature of 26-28°C at night. But I will use heat mat at 38°C inside the plant soil. I do not have a mini greenhouse. I plan to put the plant at the balcony getting direct morning sun until afternoon. Awaiting your kind advise. ありがとうございました

Taproots (power tanks) that have lost water have a high risk of rot.
If it is a locally rooted strain, the risk of rot is low because the water content reaches the taproot.

Another reason to cut the taproot is
I want to plant it in a shallow pot and enjoy it like a bonsai.
The sized pot is not stable, and the heat conductivity of the whole pot is also bad for rooting management.

Thank you so much for replying me. I got another question to ask. It is a must to cut the taproot of O.pachypus? I see everyone in Japan is cutting it but I asked some seller in Malaysia they say no need to cut. I’m worried and confused.