For example, the statement "No other entity, business or institution, can reproduce, transmit or display the images of Dunhuang in any form without the consent of the right holder." is plainly wrong.
Paintings, past the 70 years threshold in US and EU get no copyright protection. There might be a photography copyright by a photographer, but others can take their own photographs and does not infringe anyone's right.
The article seems to be overstating Dunhuang Academy's rights to images of Dunhuang.