Yup.
And even when they do know the answer, they don't want to be seen as showing off by raising their hand and answering in front of their classmates who may not know the answer.

This 'caring' or 'empathy' for others is admirable in some ways and when running a business or an army it is often productive. Imagine if the contributors to this forum were concerned about how their posts might seem insensitive or damaging to the 'cohesive nature' of the forum. The forum would have 75 posts a year instead of just today.

By western educational standards 'face' damages innovation and independent thought.

In learning an oral language skill, it is disastrous.

Yet much of China's rapid growth is a result of this 'consensus building'.

Remember the Chinese drummers in the opening of the 2008 Olympics? A thousand Chinese moving in unison. To Western eyes it was frightening. To Chinese eyes it was majestic.