Why did the Qing government dare not sign the Lhasa Treaty?

Britain and Russia fought for Tibet for a long time. /kloc-More than 0/000 British invaders suddenly crossed the Sino-Indian border, occupied Lhasa in the 30th year of Guangxu, and forced Tibetan local authorities to sign the Lhasa Treaty in an attempt to separate Tibet from China. Under the strong opposition of the people of all ethnic groups in China, the Qing government dared not sign the treaty, but Britain still gained many privileges after rewriting the New Testament.