Drawings, unknown meaning

The manuscript is written on paper and includes lots of drawings. The content is incoherent and incomprehensible. 22 pages. Cham manuscript bound by threads; cover using handmade paper; written in Chinese ink on French paper; Akhar Thrah script. Size: 27.7cm x 18.5cm. 4 pages are blank (015 - 019). The condition of the manuscript is deteriorating.