This feels like panic to me.  Shenzhen Hepalink market cap before trading started today was US$3.5 billion or so.  For it to fall 10% means it has taken down the entire value of RVX in Hepalink's portfolio in that drop...and much more.  Note that RVX share price into Friday close was sheer panic too, dropping from 2.30 to 2.12 in the last hour...despite a VWAP of 2.30.  

I looked up Amarin's share performance just before the results came.  Amarin fell 30% by Sept 21 2018...which is almost identical to RVX at 32% so far in 2019.  Also, Amarin saw rising volumes into the Sept 24 announcement.

I am putting it down to unusual factors.  We will know within a few hours anyway.