Zangmu Dam well on the way

The Indian press seems surprised by the announcement from Beijing that the Zangmu Dam on the Yarlung Tsangpo (Brahmaputra) has started. In fact, it is well on the way as these pictures from Google Earth show. Why waking up so late? Four or five other dams will follow soon the first one in Zangmu. 
A few months back, I mentioned about another dam being constructed on a tributary of the Yarlung Tsangpo, nobody seems to have noticed.