Macao's past and present in photos (5)

This combination photo shows students having a culinary class at a tourism college in Macao, south China (top, photo by Zhang Ruiqi, issued on Aug. 4, 1993) and students cooking shrimps at Macao Institute for Tourism Studies in Macao, south China on March 11, 2014 (bottom, photo by Cheong Kam Ka). On Dec. 20, Macao will celebrate the 20th anniversary of its return to motherland. Over the past two decades, the special administrative region has made great strides in economic development and achieved prosperity and stability under the "one country, two systems" principle. Since Dec. 20, 1999, the historic day for Macao, what has changed? And what remains unchanged? Our selection of photos present comparative illustrations of the south China city's past and present. (Xinhua)