Johann, if you want articles in Spanish I put you dozens, and all the speeches of the Prince in Spanish. Donna also has put the link to some news in Chinese.
Also I can remember you that the Princes of Asturias already were in China little more than one year ago, in a trip in which they met all the authorities of the country, and that the Kings of Spain were there this year.
http://www.theroyalforums.com/forums/f11/official-trip-china-july-12-14-2006-a-10187.html
http://www.theroyalforums.com/forums/f21/state-visit-china-june-24-29-2007-a-13012.html
In my opinion, for my as citizen, I believe that the trips of the authorities are Kings, Princes or leaders must be limited, that they can do a gesture for the nice photography or the anecdote, but I do not understand the long trips where the half of the activities they are more tourist than political. And I do not understand it because they are trips paid with public money.
Every Royal House has its way of acting and its priorities, and I remember you that this one is the forum of the Princes of Asturias, not of the Belgians, not of the Norwegians...
For my most important of this trip, they are not the photos, among other things, because this year in Spain we are bored of seeing all the authorities of the country in China. The important thing is that there have been closed a few economic very important agreements for the Spanish businessmen. The important thing is that thousands of persons visit an exhibition of the Royal palace of Madrid in the Forbidden City, the important thing is that in Shangai there is a library Cervantes the first step to open an Institute Cervantes, the form that has Spain of spreading its culture and its language.
Another explanation. It does not matter for me if the Princess makes acts alone or with the Prince in this trip, if they can make the activities united why to do them separately?... Another explanation, if someone has detained to follow the activities of the Spanish Royal Family and specially of the Queen Sofía, will realize that in Spain the members of the Royal Family, do not operate as representatives of the United Nations for a thing or other one. The Queen does trips and visits projects always linked or to her Foundation and its projects or to the Spanish Cooperation.