SK 3155 20 November 2021: 4 very high res. images.
Habit : Wild
it looks closer to Juncus thomsonii… let see response of other experts.
it seems J. membranaceus.
for distribution please check
Heads are solitary in both species as per Flora of China (Juncus membranaceus Royle ex D. Don and Juncus thomsonii Buchenau).
Both species are listed in that locality
What are the other listed species?
J. articulatus, bufonius, concinnus, inflexus, kingii, leucanthus, membranaceus, prismaocarpus subsp. leschenaultii, sphacelatus, thomsonbii and wallichianus