What is the pediatric fare for municipal buses?

Children under 1 year of age are free.
Children under the age of 12 (up to elementary school students) will be charged a child fare.
In addition, up to two children aged 1 to under 6 accompanied by a guardian (6 years or older) are free of charge.
Example ：
The mother rides with a 5-year-old, 2-year-old and 0-year-old. → All three children are free and only adult fares.
An elementary school student rides with a 5-year-old brother and sister. → 5-year-olds are free, only for one child fare.
A 5-year-old child rides alone → Child fares apply.
A 5-year-old and 4-year-old brothers ride with 2 people. → A child fare is required for 2 children.