Is the new flight information free receiving course credible?

The new flight information free receiving course is not credible. The free training at the beginning of Xinfei Information is true, but in the end it will make you buy some related products. Generally speaking, it is true at first, but it won't tell you much useful value. It just tells you some basic details, or you need to buy the corresponding materials and software yourself, so that you can learn the real corresponding courses, because it is impossible to teach something valuable for free. So it's not credible.