By Halo, do you mean the Alpine Halo. If you think you can get that to work, more power to you. It is a better more reliable unit all around. It will work as intended, because Alpine is a major company and cannot afford to sell crap. I just think that screen is too big, but maybe it works for you.
If you bought the harness for the Halo it probably will not work for the Joying. The site selling the harness was pretty particular about which head unit you had, and Alpine was a different product from no-name Chinese. Looks like your setup came with two black boxes, not one. So, it is definitely not the same thing I had.
Good luck.
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