sentences:  Kangding was for many centuries an important trading city where Chinese brick tea was carried by porters from Chengdu and other centres to trade for Tibetan wool.A dispute involving the sovereignty over the city between Tibet and the Qing was resolved when the Manchu forces took the city by storm in the Battle of Dartsedo in 1701.On July 1, 1786 an earthquake of 7.75 on the Moment magnitude scale ruined nearly the entire city.