I'm trying to find this out. Online versions of Jin Yong's works seem to indicate that Yin Li's meeting with ZWJ at the end has been there since the first edition of HSDS, and so this was always the official version of the story. But I'm being told that the online version of the first edition of Jin Yong's work that I've read, isn't the actual first edition of Jin Yong's work, and that there are a bunch of changes that can't be found online.
The 1986 adaptation of HSDS, which is probably the most famous, leaves this meeting out, such that Yin Li actually dies on the island, which changes her character completely. I'm wondering whether this is because the show is based on an earlier version of the written work, or because like many of the older adaptations it simply decided to change the story for purposes of better drama.