I thought it was an Epc. Siam Jade at first, but it is not.
With the Epc. Siam Jade, the petals and lip are the same color, and the sepals are green.
Your orchid has green petals and sepals and only the lip is green.
The structure does not match a C. leopoldii either. The top part of the C. leopoldii's lip remains closed and looks like a hood. And the petals and sepals are thinner, typical of the star-shaped species.
It does have a strong resemblance to Epc. Siam Jade so it could either be an offspring or a parent.