In reply to j4kub:
theres very little info because yunnan/sichuan is very undeveloped in contrast to nepal, pakistan, sth america.
lots of options exist, but its a matter of taking your chances with local operators who are notorious for not delivering, or doing much of the ground work yourself and being very self-reliant.
actual alpine climbing requires a degree of wrangling with the various chinese mountaineering associations, which is usually either an exercise in being ripped off, trusting agents or taking it on yourself and all that goes with that.
yunnan is hazy on its regulations, sichuan is even more so.
potential for under the radar trips exist, tho its a whole other subject.
for entry level trekking type stuff that takes you onto glaciers and into alpine terrain then have a look thru whats offered from operators in zhongdian (shangrila as its been dubiously renamed).
regarding tiger leaping gorge: dont be conned into treks offered thru it. its not too hard to walk thru in a long day, easily in 2, or get a taxi thru in a few hours.
its totally set up and has been for 15 years with no need for any business to be involved.