C573 The Difficult Question!

Take a close look at a bottle of mineral water, pour it into a glass, and then have the judge open another bottle from the same batch and source, pouring it into one of the glasses. Then try to find it. The difficulty of this task is even greater than microscopically distinguishing water...

The crowd erupted at Ye Tian's challenge, with many biting their lower lips and letting out excited howls