1965 - Japan and South Korea begin formal relations.

1965年的今天，日本和韩国开始正式建交。

youdao

May8, 1975, China with the European economic community establish formal relations.

中国同欧洲经济共同体建立正式关系。

youdao

Formal diplomatic relations between the two countries were re-established in December.

两国于十二月重新建立了正式外交关系。

《牛津词典》

It would be a rare-face-to-face encounter between diplomats of the two countries, which have not had formal relations in 30 years.

VOA: standard.2009.09.11

The two countries have not had formal relations since Iran's 1979 Islamic revolution and interaction between the two countries' diplomats has been infrequent.

VOA: standard.2009.06.24

Ms Rousseff's visit made clear that the countries' formal relations are catching up at last with the personal ties they have long enjoyed.

ECONOMIST: Two American giants are slowly getting to know each other

Among other defenses, the farmers maintain that unless the U.S. and Iran establish formal relations, there is no way to investigate the subsidy issue.

FORBES: Nutty

Of course this small opening was followed by the achievement of the Shanghai Communique, and the eventual establishment of formal relations between the United States and China in 1979.

WHITEHOUSE: President Obama Holds Town Hall with Chinese Youth