中国展区有三个主题。
该展区主要有三个主题：保护水源，全球变暖问题和老龄化问题。
The exhibition will focus on three topics: water source protection, global warming and the aging problem.
从专业性的各个维度来看，参展商对展区主题设置比较满意，达到3.8分。
On various professional dimensions, the exhibitors are relatively satisfied with the subject setting of in the pavilion, which has reached 3.8 points.
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