https://en.m.wikipedia.org/wiki/Sini_(script)
https://www.bahath.co/calligraphy
“The Sini script is not constrained to the rules of Arabic calligraphy thus allowing the calligrapher much more freedom of expression. The words can be written from top to bottom, bottom to top, right to left and from the middle outwards. 'The Sini Style has been modified for a really long time, there wasn’t an official document recorded, but this font was realised at the end of Yuan Dynasty (1271-368)' Haji Noor explains 'Calligraphy can increase the faith, patience, and also can cultivate one's morality.'
'Imagine Arabic calligraphy shaped into a Chinese character, or Chinese characters shaped into Arabic Quranic verses, and you will get some idea of the intricacy and the brilliance of the Sini calligraphic style.'“