Figure 1. Publications output over 20 years.
(A) Annual publication number of research of CRS and NPs. (B) The number
and proportion of publications in different research categories.
Figure 2. The collaborative networks between different
units.
Inter-country cooperation network. The color represents the cluster.
(B)
Geographical distribution of inter-country cooperation. Each connecting
line represents 5 collaborative publications between two countries. The
color represents the number of publications. (C) Inter-institutional
cooperation network. The color represents the average year of
publication. (D) Author collaboration network.