To watch the total solar eclipse, you should wear professional glasses  Yongkang brand and Shidu brand solar eclipse glasses use lenses of the same quality
The viewing effect of eclipse glasses is only determined by the quality of the lens.
 Because the price of Yongkang brand solar eclipse glasses is low, when you buy Yongkang brand rather than Shidu brand solar eclipse glasses, you can buy glasses with the same viewing effect at a lower price