Cambodia has agreed to acquire an unspecified number of military helicopters from China.

The deal involving Chinese-made Z-9 utility helicopters became public Monday. It was one of more than two dozen agreements concluded Saturday during a visit to Phnom Penh by Chinese Politburo member Zhou Yongkang.

Among the other agreements were deals on mining and power plants and an arrangement to help Cambodian mobile telephone operator CamGSM build the country's first satellite.

A wave of recent Chinese investment in Cambodia has prompted critics to warn that the country is becoming too dependent on Beijing. But a spokesman for Prime Minister Hun Sen hailed the “new era of cooperation” between the two countries.

Chinese official news media say Mr. Hun Sen promised during the talks that Cambodia will adhere to a one-China policy.

Zhou was in Phnom Penh after visits to Nepal and Laos. He is also scheduled to visit Tajikistan and Mongolia.