Now Hunan has not yet introduced the standard of restaurant fume emission, but the Environmental Protection Bureau in the implementation of restaurant fume emission testing, or to a higher standard implementation, here we can use the Beijing standard as a reference, the current Beijing standard is the most stringent standard of restaurant fume emission in the country. GOJEK's oil smoke purifier has passed the Beijing standard CMA test, so there is no problem to use GOJEK oil smoke purifier over the environmental assessment.