ITTR, I am not a tech-genius at all. But reading 400G...PAM4...16x25G remembers me of POET-IP (IP as in Interposer).
On the other hand: I can´t read the additional chinese files as I am not offered an automatic translation and my mandarin is a bit rusty :-). But patents need a reference on used external IP, or am I wrong? No mention of POET at the main document.
We´ll see. If there´s really POET inside, it is the first industrial application. That would be veeeery nice.
Holk