I loved the magic system in this novella and the protagonist's creative uses of it. 
 I would've preferred the worldbuilding to have been clearer about its origins, e.g. the author mentions that he thought about the magic system on a trip to Taiwan but there didn't seem to be a lot of background references that placed it more in fantasy Taiwan/fantasy China. I realise that this novella was part of a wider world of his, but still.