Promotion and demotions in Tibet?

New promoted Maj Gen Tang Xiao

When I wrote yesterday's post, I was not aware that Lt. Gen. Niu Zhizhong, the Chief of Staff of the People’s Armed Police was in Lhasa, from where he made his announcement about the 'promotion' of the PAP's political commissar in Tibet.
Nui was received by Pema Thinley (alias Pema Choling), the Chairman of the TAR’s People's Congress (and senior most Tibetan in the Party). Deputy secretary Wu Yingjie (also vice chairman of the TAR) and the powerful secretary of Politics and Law Committee, Deng Xiaogang were also present.
Lt. Gen. Niu Zhizhong briefly described the purpose of his trip to Tibet; he expressed his gratitude to the regional party committee and the Tibet government for their support in the build up the People’s Armed Police Force; he also congratulated the Tibetan leaders for the region's achievements in terms of development and ‘stabilization’ of the region.
He spoke of the long-term dedication of all cadres posted on the snow-covered plateau, and their work for the masses. He said that Tibet Armed Police Force should continue to follow the Party's command (are they not always following??); they should serve the people in the fine heroic tradition; they should actively participate in the local construction, in order to build a well-off society and realize the great rejuvenation of the Chinese Dream (so dear to Xi Jinping).
Nothing really new, except that the Commander of the Tibet Armed Police Corps Maj. Gen. Song Baoshan, and the Political Commissar of the Tibet Armed Police Corps, (now) Lt. Gen. Tang Xiao were in attendance.
While Tang Xiao had just received his promotion, it is not the case for Song Baoshan who remains Major General.
What a public insult for Song!
A military expert told The South China Morning Post that "the commanding officer of Tibet’s armed police force is expected to be promoted to a rank equivalent to lieutenant general as well, because the commanding chief of an army usually has a rank at least equal to that of a political commissar."
The issue is that Song has not been promoted.
The expert explains thus the strange situation: "The very fact that the political commissar’s promotion came before that of the commanding officer underscored the notion of ‘party commands the gun’.”
The expert believes: "The directive of the promotion is intended to show that military must only answer to party leadership and serve the best interest of the Party.”
Well, it is one explanation.
Let us first see if Song Baoshan is also promoted, he may not, in which case, 'experts' will have to find another explanation.