Here's a link for non-mobile devices:
https://world.taobao.com/item/25216172723.htm
I don't think it's ready yet ... the translation says:
NC450 is currently undergoing final testing
Our preparations underway related accessories
Official sales have been just around the corner, so stay tuned!
Edit: I don't know why the link doesn't work. Here's how to access it ... go to
https://world.taobao.com and search for 'zongshen nc450'.