Although China has 9.6 million km^2 of territory, every centimeter is 100% necessary and essential. This 1000 km^2 is a small step forward but we've given up much disputed territory.
i think both countries will shrink in territory on map after negotiation, nothing but bargain skills. there is a chinese saying 漫天要价,坐地还钱
after reading the news, i guess china might gain a few defacto territory?