$USD/CNH = Offshore Spot - Freely traded in Singapore, London, Lux...etc. $7.0891 as of 11:30pm PST.
$USD/CHY = OnShore Spot -- official set today $6.9110
Unaware of any CHY Future mrkt.
But, no idea why people would think Bejing would seriously try to defend the range of their self-imposed...