The first day of school in the China falls on 1 September, or the first Monday following if September 1 is a Friday, Saturday, or Sunday. In northeastern China, schools open on Monday in mid-August after summer vacation.
3) Improper heating profiles setting lead to unbalanced heating zones temperature inside heating furnace, which causes uneven glass temperature on both different parts of the glass sheet and between the top and bottom glass surfaces, thus may brings irregular white haze on glass surfaces.
Unfortunately, a lot of glasses wearers have some bad cleaning habits that actually damage the lenses. The best ways to clean your cloudy eyeglasses lens will not only enhance the longevity of your eyeglasses but will also make meetings and social events much more enjoyable.