Saudi Arabia’s King Salman and Chinese President XI Jinping oversaw the signing of deals worth potentially 65 billion dollars in the start of the monarch’s visit to Beijing, as the world’s largest oil producer looks to cement ties with the world’s second largest economy.

King Salman, who has overseen the launch of an ambitious economic reform plan since his accession two years ago, is on a month-long Asian tour.

After the signing ceremony, Deputy Chinese Foreign Minister Zhang Ming said the memorandums of understanding and letters of intent were potentially worth about 65 billion dollars, involving everything from energy to space, but he did not give details.

The two leaders later attended the closing ceremony of the “Roads of Arabia” historical relics exhibition at the national museum of China.