A set of bonsai photographed on site at a park bonsai exhibition - can you recognize what tree species they are?

A bonsai invitational exhibition held at a park in the ancient city of Kaifeng will close in a few days. In order not to miss this rare viewing opportunity, the editor recently went to the park to see the exhibition. As soon as I arrived at the exhibition site, I was attracted by each exquisite bonsai work. It is understood that this bonsai exhibition displayed more than 200 works submitted by bonsai experts from several provinces across the country and some cities in Henan Province. The bonsai are very beautiful, but unfortunately the editor knows very little about the tree species used to make bonsai. I am now posting a set of bonsai works to share with everyone, and at the same time asking everyone to guess what tree species these bonsai are made from.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Figure 20