How to change the tire correctly

Can I mix tyres of different speed levels?
If two tires with different speed levels are installed on the same vehicle, regardless of the drive axle, please install the tires with higher speed levels on the rear axle to prevent potential vehicle oversteer. In addition, do not drive the vehicle beyond the maximum speed of the tires (for example, the maximum speed of tires in winter is generally low, so remember not to exceed the maximum speed of tires during use).
Can I mix different types of tires?
For optimum overall performance, all four wheel positions should use the same type of tyre.
Tyres of different sizes, structures and wear conditions may affect the handling and stability of the vehicle. Please note that some vehicles intentionally use tires of different sizes on the front and rear axles. For example, most sports cars are equipped with tires of different sizes on the front and rear axles.
In addition, please do not mix radial and non radial tires on the same vehicle. If you have to mix tyres, do not mix radial and non radial tyres on the same axle. If two radial tyres and two non radial tyres are installed on one vehicle, the two radial tyres must be installed on the rear axle and the two non radial tyres should be installed on the front axle.
For four-wheel drive models, if the owner's manual does not indicate the operating instructions for mixed use of tires, please observe the following principles:
Do not mix tires of different sizes. All four tires should be the same size.
Do not mix radial and diagonal tires. All four tyres should be radial or diagonal.
Do not mix tyres with different tread patterns, such as all road and summer tyres.
Do I have to replace my existing tires with the same size tires?
Do not choose a tire that is different from the original tire size. The replacement tyres shall be of the same size - or an optional configuration approved by the vehicle manufacturer. The correct tire size can be found on the vehicle information plate on the door or in the vehicle owner's manual.
Check the marks on the tire sidewall to know your current tire size.
If I only bought two tires, how should I install new tires?
If you only replace two tires, make sure that the new tires are installed on the rear axle of the vehicle. The reasons are as follows:
The new tyre can provide better wet grip than the old one.
When the new tire is installed on the rear axle, the risk of the vehicle flailing or floating on the wet road can be reduced.
Do not use a used tire, because you never know what damage the original tire has suffered.
Internal injuries can cause tire damage and cause danger.