The top legislator called for stronger infrastructure construction cooperation, urging Chinese businesses to play a bigger part in Cambodian transportation, electricity and telecommunications construction.
Wu said Chinese financial institutions would like to provide financial support, calling for both sides to explore new ways of finance.
He also pinned hope on stronger investment and industrial cooperation, appealing for faster construction of a special economic zone at Sihanouk Port, which Chinese businesses got involved in building.
Hun Sen agreed with Wu, saying the two countries should work more closely in agriculture, infrastructure, economic zone construction and resources development.
Hun Sen reaffirmed Cambodia's adherence to the one-China policy, saying Cambodia banned any forces from separating China.
Both Wu and Hun Sen agreed that the international situation was undergoing profound changes, saying the two countries should step up cooperation between China and the Association of Southeast Asian Nations (ASEAN) and east Asian cooperation.
Earlier Thursday, Wu also met with Cambodian King Norodom Sihamoni and legislative leaders.
Wu arrived in Phnom Penh on Wednesday afternoon. Cambodia is the first leg of Wu's three-nation visit to Southeast Asia, which will also take him to Indonesia and Thailand.