Original sentence: The fare is HK$2 for adults, and HK$1 for children under 12 and senior citizens aged 65 or above
Edited sentence: The Hong Kong tramway system is not only one of the oldest public transport systems in the world, but also one of the cheapest.The fares are HK$2 for adults, and HK$1 for children under 12 and senior citizens aged 65 or above