Which brand of car seat is better?

Regarding the testing indicators of child safety seats, the following four points are mainly seen:

One look: Look at the ranking, the higher the ranking, the better the test score, the better the indicators representing the seat;

Second look: look at the "ISOFIX" interface (international general child safety seat interface), "JA" stands for equipped interface, "NEIO" is not equipped, general German cars, imported family cars or domestic production of cars after the introduction of China's strong standards since 2012 are equipped with this interface, it is recommended that families with interfaces try to choose seats equipped with interfaces;

Three looks: look at the "sicherheit" (safety), accounting for 50% of the score, the reason why ADAC is authoritative is because its safety test is to test whether it can protect the baby's safety under 70 km h crash conditions, which is much stricter than the ordinary 50 km h crash test;

Four looks: look at "bedienung" (ergonomics), accounting for 50% of the score, ease of installation, effective adjustment of shoulder width and headrest height adjustment, comfort, etc. are all ergonomic test considerations, the purpose is to test the most comfortable riding experience and the safest protection in the process of nearly 12 years;

Domestic or foreign **What is the range. At what age. Give me a range to help you recommend