Space-time classroom adopts audio-video interaction mode and is applied to real-time education in various fields. From preschool education, primary and secondary education to higher education, vocational education, continuing education and enterprise training, it covers a variety of educational methods of all ages, thus meeting the different needs of all scholars.

Futures are the subject matter of present trading and future delivery. This subject matter can be gold, crude oil, agricultural products, financial instruments, financial indicators and other commodities. The delivery date of futures can be one week later, one month later, three months later or even one year later.