Do you know what it means to let China own the high speed railway for 50 years?
Indonesia now sees economical development with increasing population. So, we can expect revenue of the high speed railway amid such a development.
But, 50 years later, Indonesia would be puzzled with aging society and low fertility rate. It's time to see decreasing passengers of the high speed railway. At the same time, it would be succeeded from China to Indonesia. As a result, China can own it when it earns much money. Indonesian authorities know that?