BEIJING, April 15 -- General Secretary of the Communist Party of China Central Committee and Chinese President Xi Jinping and General Secretary of the Communist Party of Vietnam Central Committee and Vietnamese President To Lam jointly attended a signing ceremony of cooperation documents in Beijing on Wednesday.

The documents covered areas including inter-party exchanges, public security, justice, economy, industrial and supply chain cooperation, customs cooperation, science and technology, people's livelihoods, human resources development, media, and sub-national cooperation.