Recommended scenic spots:
Lhasa: Potala Norbulinka
Linzhi: Lulin Langbahai Songcuo (highly recommended)
Shigatse: Tashilhunbu Sakya Temple
Shannan: the birthplace of Tibetan civilization: Yang Zhuoyong Cuoyong Bulakang (the first palace in Tibet)
Naqu: Namco (the most beautiful place)
I wish you a pleasant journey!