2.How do we choose the right device for online learning?
Currently, online learning is mainly conducted through electronic devices,including projectors, TVs, computers, tablets, and mobile phones. Students have to shift from the classroom-based learning model to home-based,watching videos, and doing homework online to fulfill their daily tasks. So how do we choose the right device for online learning?

(1) The size of the screen is the priority when you select an electronic device. If possible, choose an electronic device with a large screen. The recommended order goes from projector, TV, computer, tablet, to mobile phone. Project the course video to a large screen or transmit it to a large TV screen so that the student can watch it at a distance greater than 10 feet,thus avoiding the use of his/her eyes at a close range.
(2) Choose an electronic device with a higher resolution to reduce eye discomfort and fatigue.
(3) An LCD display is recommended when using a computer. Adjust the screen brightness and make sure it is comfortable for the eyes.