Is there a childrens ticket available for long distance trains?

Hi, children below 1.2 m will enjoy free tickets; children who are between 1.2 m ~ 1.5 m need to buy a child ticket; and if the children are above 1.5m, they need to buy adult tickets. And children who enjoy free ticket or child ticket need to share soft sleepers with adults or if a child wants to stay in a bunk on his own, he need to buy an adult ticket.