YINN is not intended to be a buy and hold, nor is YANG. They are designed to play short term moves, usual daily, in market movement for a basket of stocks not the market as a whole.
Please be aware that YINN holds Hong Kong listed securities which don't track China based securities 1-for-1, there are different share classes and Hong Kong has it's own market dynamics.
Please also be aware that YINN, as a 3x ETF on an already voliatile index, can and will and has made very sharp movements in USA after hours that can be difficult to manage.
Options market for it is active but a bit thin.
In other words, be careful.
Oops, wrong forum for the factual info \^\^\^\^ even though important to know.