Wow. I've got to hand it to them that is very professionally done. Very clear instructions and useful exercises for beginners - not just general flying but for camera work (e.g. circling whilst keeping camera facing the centre, etc)
They hammer the safety message, which is good. They also explicitly mention not to fly over 400ft which will please the CAA in the UK as that's the height restriction for RC mentioned in the Air Navigation Order (ANO), which has legal status. I understand it's the guideline limit issued by the FAA?
Smart-looking document, well done to DJI for that - excellent English, too.