![A worker checks vinegar aired in a jar at a vinegar plant in Chishui, southwest China\'s Guizhou Province, Nov. 18, 2018. Chishui maintained a traditional method to make vinegar with over 30 process steps.(Xinhua/Wang Changyu)](http://www.ecns.cn/hd/2018/11/20/427e44f908984f6fb3b2751b59a57f16.jpg)
A worker checks vinegar aired in a jar at a vinegar plant in Chishui, southwest China's Guizhou Province, Nov. 18, 2018. Chishui maintained a traditional method to make vinegar with over 30 process steps.(Xinhua/Wang Changyu)
![A worker shows the newly-made vinegar at a vinegar plant in Chishui, southwest China\'s Guizhou Province, Nov. 18, 2018. Chishui maintained a traditional method to make vinegar with over 30 process steps.(Xinhua/Wang Changyu)](http://www.ecns.cn/hd/2018/11/20/b838412f57434b96b0e60d69c1e35171.jpg)
A worker shows the newly-made vinegar at a vinegar plant in Chishui, southwest China's Guizhou Province, Nov. 18, 2018. Chishui maintained a traditional method to make vinegar with over 30 process steps.(Xinhua/Wang Changyu)
![A worker stirs raw materials to make vinegar at a vinegar plant in Chishui, southwest China\'s Guizhou Province, Nov. 18, 2018. Chishui maintained a traditional method to make vinegar with over 30 process steps.(Xinhua/Wang Changyu)](http://www.ecns.cn/hd/2018/11/20/dfedb2f287f049e1886ad1a2d6981603.jpg)
A worker stirs raw materials to make vinegar at a vinegar plant in Chishui, southwest China's Guizhou Province, Nov. 18, 2018. Chishui maintained a traditional method to make vinegar with over 30 process steps.(Xinhua/Wang Changyu)
![A worker checks vinegar aired in a jar at a vinegar plant in Chishui, southwest China\'s Guizhou Province, Nov. 18, 2018. Chishui maintained a traditional method to make vinegar with over 30 process steps.(Xinhua/Wang Changyu)](http://www.ecns.cn/hd/2018/11/20/f7fc6f8fe84a409d8c05d5da96bb2102.jpg)
A worker checks vinegar aired in a jar at a vinegar plant in Chishui, southwest China's Guizhou Province, Nov. 18, 2018. Chishui maintained a traditional method to make vinegar with over 30 process steps.(Xinhua/Wang Changyu)
![A worker checks the fermentation situation for vinegar brewing at a vinegar plant in Chishui, southwest China\'s Guizhou Province, Nov. 18, 2018. Chishui maintained a traditional method to make vinegar with over 30 process steps.(Xinhua/Wang Changyu)](http://www.ecns.cn/hd/2018/11/20/ba0b32192631428bbb5e6d32a350127b.jpg)
A worker checks the fermentation situation for vinegar brewing at a vinegar plant in Chishui, southwest China's Guizhou Province, Nov. 18, 2018. Chishui maintained a traditional method to make vinegar with over 30 process steps.(Xinhua/Wang Changyu)
![Aerial photo taken on Nov. 18, 2018 shows workers checking jars at a vinegar plant in Chishui, southwest China\'s Guizhou Province. Chishui maintained a traditional method to make vinegar with over 30 process steps.(Xinhua/Wang Changyu)](http://www.ecns.cn/hd/2018/11/20/5e4e5036de384e30a27b1461e8da70d7.jpg)
Aerial photo taken on Nov. 18, 2018 shows workers checking jars at a vinegar plant in Chishui, southwest China's Guizhou Province. Chishui maintained a traditional method to make vinegar with over 30 process steps.(Xinhua/Wang Changyu)
![A worker stirs raw materials to make vinegar at a vinegar plant in Chishui, southwest China\'s Guizhou Province, Nov. 18, 2018. Chishui maintained a traditional method to make vinegar with over 30 process steps.(Xinhua/Wang Changyu)](http://www.ecns.cn/hd/2018/11/20/a28fa219efa5411aa38634fe99d0573e.jpg)
A worker stirs raw materials to make vinegar at a vinegar plant in Chishui, southwest China's Guizhou Province, Nov. 18, 2018. Chishui maintained a traditional method to make vinegar with over 30 process steps.(Xinhua/Wang Changyu)