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.
One way that eyeglasses will cause a headache is if the prescription needs to be updated and youâre experiencing eyestrain looking through the old one. Just like when you get a headache from not wearing glasses when you need them, the same can happen if you require a stronger prescription with the glasses you have. When the prescription in your eyeglasses isnât strong enough, your eye is going to strain to correct the issue, and a headache will often be the result.