Xi said China will enhance mutual political trust, promote practical cooperation, deepen cooperation in international affairs, achieve common development with the countries and contribute to world peace, stability, and prosperity.
Xi made the comments as he exchanged messages with Argentine President Mauricio Macri on bilateral ties, the summit and Argentina's economic situation.
Wu said subsidy cuts will see small and uncompetitive players wiped out faster than expected but outstanding performers would not be affected much.
Xi made the remark in a congratulatory message delivered to the opening of China Pacific Tourism Year 2019 held in Apia, capital of Samoa, on Monday.
Wuhan-based Dongfeng is the country's third-largest automobile group by sales, and has over 160,000 employees. It has partnerships with international companies like Honda, Nissan, PSA and Renault.
Wuxi of Jiangsu province has been an attractive destination for Japanese investment thanks to a long history of cooperation between the two, and both parties wish to strengthen the relationship, said Wuxi Party Secretary Huang Qin at the conference.
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Wu was elected KMT chairman on May 20 with 52 percent of the vote.
Wu, China's deputy permanent representative to the UN, spoke at a United Nations Security Council meeting on Friday in New York about recent protests in Iran. The United States was criticized for requesting to meet on what some member states said was an internal issue for Tehran.
Xi delivered the message in a congratulatory letter to the association on its 100th anniversary.
Xi said that with the joint efforts of both sides, the important consensus reached by the two leaders during his state visit to Laos in November has been implemented efficiently, which has benefited the people of both sides.