Don't underestimate Fukien tea. It is a true tropical with a waxy leaf structure. It can stand direct tropical sun and tropical temps without batting an eye. I can keep them outside here in Southern California in full sun and they love it.
When I look at your tree, I have to admit - it looks extremely pale and leggy, like it isn't getting enough sun. I just went out and snapped a photo of a Fukien tea in my backyard. A healthy Fukien tea will have dark green foliage that is very tight. Interior leaves will yellow and drop, but the tree should never look sparse.
If you are keeping it indoors you should focus on light (grow light NOT heat light) and humidity. Sometimes people assume tropical trees need HEAT. They generally don't unless you live somewhere where the temps regularly fall below freezing. The plant in my photo sits outside 365 days a year - through light frosts and numerous nights in the 40's (F). Focus on providing strong lighting (without heat) and keeping the tree foliage from being too dry.
It just so happens that when I snapped this photo we are having some mist from marine layer from the ocean. I live 5 miles from the Pacific, but at this time of year we occasionally get heavy marine layer that mists the trees. It is not that normal - perhaps once or twice per month. I say this because I don't want you to think I mist my trees. Most of the time they are dry.
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