It seems Ross is looking for a change in interview format from round 2? Excerpts from admission blog:
The first wave of Round 2 interview invitations will go out on Thursday, January 10. One of the things that the team and I are working on this week is a pilot for a supplemental interview process designed to give us further insight into candidates' fit with our learning community. Because of the highly interactive and team-based nature of our classes, we're seeking to assess applicants' ability to communicate in a group setting and work with others.
The pilots will be conducted in Beijing and Shanghai, and I'll be in China on January 26th and 27th to facilitate both sessions. We plan to have current students and alumni participate as well. We're inviting candidates to attend this supplemental interview based on geography, so read your interview invitation carefully for more details.