Looks like NFI were on the verge of giving BYD the boot anyway from this article...
https://www.electrive.com/2019/05/30/nfi-will-expand-e-bus-offer-with-adl/
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The article actually says "If future electric models by ADL are developed on the basis of NFI development, both manufacturers will hardly get in each other’s way with their other brands, which should all be retained." So I'm not sure that I interpret it the same way as you do.