The child’s height is 155 cm and his age is 10 years old. Usually, the height of a 10-year-old child is close to that of an adult. The height limit for many parent-child tickets is set between 1.2 meters and 1.4 meters, depending on the specific scenic spot or activity. If 155cm is within this range, then the child should be able to purchase a parent-child ticket with an adult. However, for specific circumstances, you need to refer to the regulations of the place where the ticket is purchased.