On August 9th, China launched a new round of central environmental inspections covering eight provincial-level areas, as the country finishes nationwide investigations into local environmental protection efforts. A total of eight provinces including: Jilin, Zhejiang and Shandong provinces will be the most hit hard

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Source: http://english.sepa.gov.cn/News_service/news_release/201707/t20170727_418638.shtml

Environmental inspections have caused great impact on steel prices. Because steel components is the main structure of prefab house,and many accessories are made of steel,the whole supply chain has been affected by the inspection.

Source: http://usa.chinadaily.com.cn/china/2017-07/31/content_30298900.htm

 Along with the environmental inspections,more and more polluting factories will be shut down,it also effect the prefab house industrial,now we are facing the price increasing of raw materials,maybe later we will see the short supply of raw materials.