I don't have a Jinma, I have a Yuchai bulldozer. The same nylon suction strainer was used in both applications. My installation was more straightforward because the strainer goes directly into the side of the reservoir at the bottom.
There are all different sizes and configurations of suction strainers, you can find something that will work. Try hydraulic shops, Grainger, McMaster-Carr, etc. If you have the capability, you can install an in-line spin-on suction filter.