The both privies can negotiate with the change of contract according to changed circumstances, if the negotiation burst, they can ask the court to arbitrate .
双方当事人可依情事变更原则就合同的变更部分进行协商，协商不成可请求法院公裁。
2
Street Dalian, Beijing, Fuxing North-South Lane old building for the last century 20's to 40's built buildings, rooms without heating, gas and water up and down, utilities aqua privies.