《旧唐书·列传·卷五十》
不多久，吐蕃侵犯边土，又召回解琬任散骑常侍，令他与吐蕃划定地界，兼处置十姓的降户。
未几，吐蕃寇边，复召拜左散骑常侍，令与吐蕃分定地界，兼处置十姓降户。
Not long after, Tufan invaded the border, and Jie Wan was summoned back to serve as honorary attendant and ordered him to demarcate the boundaries with Tufan and resettle the ten families of immigrants.