PHNOM PENH, Cambodia (AP) — Sri Lankan President Maithripala Sirisena has arrived in Cambodia on a visit to expand the countries’ cooperation in economic, trade, tourism and cultural fields.

Cambodia’s foreign ministry said in statement that the four-day state visit beginning Wednesday came at the invitation of King Norodom Sihamoni.

Sirisena will have an audience with the king and will meet Thursday with Prime Minister Hun Sen.

He will also attend a tree-planting ceremony at a Buddhist meditation center on Oudong Mountain, 40 kilometers (25 miles) northwest of Phnom Penh, where he will donate 10 Sri Lankan ironwood trees. The foreign ministry noted that Buddhism, the majority religion in both countries, connects them closely.

Sirisena and his delegation will also visit the famous Angkor Wat temple complex in the northwest before departing Cambodia.