Argentina
Argentine President Mauricio Macri said the Chinese and Argentine economies are highly complementary.
Argentina would like to cooperate with China in are-as involving energy, business, investment, quality inspection, infrastructure and tourism, he said.
Argentina supports China in hosting a successful G20 Summit in Hangzhou, Macri said.
President Xi Jinping said the two countries should implement major cooperative projects in railways, hydropower, as well as nuclear power, and enhance cooperation in areas such as culture, science and technology, tourism, soccer and local government exchanges.
China congratulates Argentina on becoming the host country of G20 Summit in 2018, Xi said.
Turkey
Turkish President Recep Tayyip Erdogan said Turkey wants to expand its cooperation with China in fields including investment, energy, aviation, agriculture, tourism and infrastructure, and expects to jointly fight terrorism and explore third-party markets.
President Xi Jinping said the two countries should keep inmind core issues in a spirit of mutual political trust. China appreciates Turkey's promise not to allow anything to happen within its borders that could hamper China. He expected bilateral anti-terrorism cooperation to yield more tangible results.
After their meeting, the two presidents witnessed the signing of cooperation agreements in fields such as energy and quarantine.
Italy
Italian Prime Minister Matteo Renzi said Italy is pleased to see the bilateral relationship with China get "increasingly close".
Italy expects to deepen cooperation with China in fields including trade, finance, culture and healthcare, he said.
He added that his country is ready to take part in building the Belt and Road Initiative.
President Xi Jinping said progress in bilateral cooperation in recent years has brought tangible benefits to the peoples of the two countries.
Beijing and Rome should stick to the main direction of strategic mutual trust and respect each other's core interests and major concerns, he said.
Chad
Chadian President Idriss Deby appreciated China's efforts to direct the G20's attention to African development.
The mutual understanding and support typical of China-Africa relations stands out among all of Africa's external relations, he said.
The president said Chad cherishes its good ties with China and expects to consolidate cooperation with China in fields involving renewable energy, mineral resources, trade and healthcare.
President Xi Jinping welcomed Chad to the G20 Summit as the representative of the African Union. Xi said China will help Chad to expand its capability building on national defense and stability maintenance.
South Africa
South African President Jacob Zuma said the bilateral relationship with China is deepening and cooperation in various fields is developing rapidly.
South Africa endorses China's contribution to the development of Africa. South Africa is ready to closely work with China on cooperation regarding the United Nations, the G20, BRICS and the China-Africa Cooperation Forum, he said.
President Xi Jinping said the comprehensive strategic partnership between China and South Africa is marching forward, and China-South Africa relations are better than ever and are at a historic stage in its development.