Before revision:  However, the drop in small team output is much steeper in China. More importantly, as research teams in China shift from small to large size, the team diversity that is essential for innovative works does not increase as much as that in other countries.
After revision:  However, the drop in small team output is much steeper . As teams in China shift from small to large size, the team diversity that is essential for innovative works does not increase as much as that in other countries.