Thank you for your comments, China Guy and Chlidonias! My problem is that I have only two and half days for the visit. Well, half day for Swan, one for Balang Shan and one for Wuyping & getting back to Chengdu. Well, if he road was blocked then, I would also have the night, as my departure from Chengdu is on the following morning.
I will send the private message, as soon as I have figured out how to do it.
In regards to Visas, I guess the Chinese embassies have slightly different interpretation of their rules in each nation. It is, however, no problem for me, because I already have made accommodation bookings for the whole visit, as suggested in one of your messages.
I once flew from Coca (1.000 m) to Quito (2.800) and drove straight to 3.300 to sleep there in my car, and continued to 3.800 after five hours. Signs of altitude sickness followed, being relieved by driving down, at 2.200 m. Before retreat, I did however score with the target species...