Figure 1 The status of Past Cleanroom Show China exhibitions ：

Figure 2 The Training Changes sheets of China Clean Room Engineers：

Market prospect:

At present, there's huge market space in China contamination control technology with market share of no less than 16.5 billion RMB (about 2 billion US dollar) Micro-electronics of information industry 3 billion RMB/year Photo-electronics of information industry 2 billion RMB/year Medical and biological engineering 4.5 billion RMB/year. Medical treatment and sanitation 6 billion RMB/year Others 1 billion RMB/year