Pinggu line
Line 22 ( Pinggu line ) of the Beijing Subway is a rapid transit line under planning in Beijing and Hebei Province . 
<triplet> Pinggu line <subj> Beijing Subway <obj> part of <triplet> Beijing Subway <subj> rapid transit <obj> instance of <triplet> Beijing <subj> Hebei <obj> shares border with <triplet> Hebei <subj> Beijing <obj> shares border with