Shandong Taisheng talks about a plant that lowers blood sugar. What kind of plant is this?

Jiangtangshu is a woody plant, which can grow to one meter high and has broad green leaves. Suitable for growing in tropical, temperate and equivalent areas, with long growth period, cultivable, rapid propagation and sustainable utilization by pruning.

The leaves of Jiangtang tree can be eaten, which can lower blood sugar, blood lipid and blood pressure, and has a significant therapeutic effect on diabetes.