About A burning issue,we also redo and test X that burning smell,tests showed no problem with combustion (see attached photos).Therefore,our analysis may be that our W misused.The samples were divided into two groups of us out to you (see annex a list of two groups),please help us look at the first W is not used in the second batch of the same?If different,it appears to be our second batch of W with the wrong About A burning issue,we also redo and test X that burning smell,tests showed no problem with combustion (see attached photos).Therefore,our analysis may be that our W misused.The samples were divided into two groups of us out to you (see annex a list of two groups),please help us look at the first W is not used in the second batch of the same?If different,it appears to be our second batch of W with the wrong