August 3, 2016, the People's Committee of Quang Binh province with Official Letter No. 1213 / Committee on the time-VX mining tourist routes "Conquering Son Doong - the world's largest cave." Accordingly, the province agreed to allow the Company Limited Chua Me Dat (Oxalis) continue to exploit the tourist route "Conquering Son Doong - the world's largest cave," from May 01 - 8/2017, copper the Management Board requests the Phong Nha - Ke Bang, the company implemented the exploitation Oxalis to ensure sustainability, not break the natural landscape, the lowest limit negative impacts on the environment natural, scenic caves, in accordance with the master plan for sustainable tourism development in the region National Park Phong Nha - Ke Bang has been approved and prescribed in Decision No. 3753 / QD-Committee 24/12 / 2014 of the PPC.
According to information from the company said Oxalis, 2016, the Company has effectively exploited tourist route "Conquering Son Doong - the world's largest cave." In 2016, the unit has received 442 visitors, grossed nearly 32 billion. Since operators and now has about 1,300 visitors successfully conquering Son Doong.