The NHK Official Site is showing these changes in Pairs:
Ding/Ren (2nd scoring event) OUT
Shen/Zhao (non-scoring event) IN
I thought once the seeded skaters were scheduled to compete, they picked their non-scoring event and after that, the schedule couldn't be changed. Shen/Zhao were never scheduled to skate at NHK, now they are skating as a non-scoring event, and Ding/Ren are out.
The ISU PAIRS schedule still shows Ding/Ren.