A Detailed Guide to Hydroponic Techniques for Black Pine, Chinese Juniper, and Maple Bonsai

I just came across someone growing bonsai such as pine, Chinese juniper, maple, and ginkgo using hydroponics, and I couldn't wait to show fellow enthusiasts.
Without further ado, let's look at the pictures first.
Chinese juniper and pine
Maple, pine
Specially made glass bottles, melted and fixed onto rocks
A whole table of them, all growing well
According to what others say, these bonsai all have to go through a special set of cultivation methods in the early stages, with a special circulation system. These trees were originally grown in pots, and after being cultivated with this system for a period of time, they can be switched to hydroponics. As for how this circulation system is made, it is unknown; that is someone else's trade secret.
Bonsai made this way only need the water changed once a week
Add some nutrient solution to the water
The root system is very healthy, and new roots have grown out.