Wang Yi (R), director of the Taiwan Work Office of the Central Committee of the Communist Party of China, shakes hands with Chinese Kuomintang Chairman Wu Poh-hsiung prior to Wu's departure in Nanjing, capital of east China's Jiangsu Province, June 1, 2009. Wu Poh-hsiung finished his eight-day mainland visit and left Nanjing for Taipei in southeast China's Taiwan on Monday. (Xinhua/Han Yuqing)

NANJING, June 1 (Xinhua) -- Mutual trust and benefit were the key words of Kuomintang (KMT) Chairman Wu Poh-hsiung's visit to the Chinese mainland, said the mainland's Taiwan affairs chief Wang Yi Monday.

Wu concluded his eight-day mainland tour and left for Taiwan on Monday afternoon.

The two themes had been running through the improvement and development of cross-Straits ties, said Wang Yi, director of the Taiwan Work Office of the Communist Party of China (CPC) Central Committee, when seeing Wu off at the airport.

"Mutual trust is the foundation while mutual benefit is the goal," he said.

"Only by consolidating and promoting mutual trust can the two sides set aside dispute, seek consensus and shelve differences, solve problems, and create a new phase in the peaceful development of cross-Straits ties," he said.

Wang Yi (R Front), director of the Taiwan Work Office of the Central Committee of the Communist Party of China, speaks prior to the departure of Chinese Kuomintang Chairman Wu Poh-hsiung (L Front) in Nanjing, capital of east China's Jiangsu Province, June 1, 2009. Wu Poh-hsiung finished his eight-day mainland visit and left Nanjing for Taipei in southeast China's Taiwan on Monday. (Xinhua/Han Yuqing)

Wu said mutual trust improved naturally in the past year.

Apart from showing goodwill and building mutual trust, the mainland and Taiwan took pragmatic measures to help each other, he said.

The mainland was organizing purchasing tours to Taiwan to help deal with the economic downturn, Wu said. He saw Taiwan companies involved in many big projects when he attended the Chongqing-Taiwan Week in the southwest municipality.

Wu visited the mausoleum of Dr. Sun Yat-sen, the KMT party's founder and a forerunner of China's anti-feudalism revolution, earlier on Monday in commemoration of the 80th anniversary of the official burial of Dr. Sun in Nanjing, capital of eastern Jiangsu Province.

Nanjing was the last leg of Wu's eight-day mainland visit, which had taken him to Beijing, Chongqing and Hangzhou previously.

Hu Jintao, general secretary of the Communist Party of China (CPC) Central Committee, met with Wu on May 26, promising to begin talks on a cross-Straits economic cooperation pact and to avoid "internal struggle" in foreign affairs.