There are some things which could not be expressly mentioned, but one's facial expression or attitude could reveal a person's thoughts and opinions.
Great Elder Ying Yu chose to remain silent, as he had already made his arrangements. He merely had to "add on to the fire".
Sixth Elder did not continue, and waited quietly at the side.
Following the Nine Pinnacles Mountain disciple's announcement, the space in front of the Middle Stream Cauldron was filled with a few hundred disciples shortly after.
Everyone of them seemed solemn.
Four Elders, each clothed in a black robe, were standing in front of the disciples, waiting quietly too.
During this time, due to the weird occurences in the Holy Region, many disciples and Elders were sent out, leaving only a few to guard the place. Only Great Elder Ying Yu and four Elders were left in Nine Pinnacles Mountain, as well as a few hundred disciples.