The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Choose the missing words of the phrase or sentence.

The china-Japan Treaty of Peace and Friendship of 1978 should be commemorated and followed well, Chinese Foreign Ministry spokesman Hong Lei said Monday. The treaty defines the direction of China-Japan friendship from generation to generation, and consolidates the political foundation for the long-term development of bilateral relations, Hong said.
Japan should （） the Treaty of Peace and Friendship.