"At the moment, Sơn Đoòng is being exploited in a way regarded as non-mass exploring tourism. After a wave of tourists, there is a down time when the ecosystem in Sơn Đoòng is allowed to recover. For me, it is the optimal way to exploit it. It helps people who explore this heritage to be aware of what they possess, what their country possesses and what the world possesses; they will have lessons learnt about the ecosystem that they need to preserve. Some people having conquered Sơn Đoòng share that it is a disgrace to see even foreigners love the cave more than Vietnamese."
