1, Oriental Cable Subscriber: channel number 90.

2. IPTV users in the insider: channel number 690.

3. Network: Shanghai Micro School, Tencent Campus.

The air classroom in primary and secondary schools in Shanghai has been continuously broadcast since September 2020 1, and online teaching has been provided for more than 0.4 million primary and secondary school students in Shanghai 12 through the live channel of Oriental Cable and bestv IPTV. Students who can't watch TV can attend classes through computers, tablets, mobile phones and other terminals, and will also provide course video downloads on related websites.

Introduction to mathematics:

Mathematics is a subject that studies concepts such as quantity, structure, change, space and information. Mathematics is a universal means for human beings to strictly describe the abstract structure and mode of things, and can be applied to any problem in the real world.

All mathematical objects are artificially defined in essence. In this sense, mathematics belongs to formal science, not natural science. Different mathematicians and philosophers have a series of views on the exact scope and definition of mathematics.