China's Li Qiang vows 'practical' cooperation with Asean in bid to reassure region amid maritime disputes, US pressure

China will pursue "practical" cooperation with Southeast Asia, Chinese Premier Li Qiang said on Sunday, seeking to reassure regional leaders of his country's focus amid persistent territorial disputes and a reinvigorated US charm offensive.

"When the world order and geopolitical conditions are unstable, honesty and faithfulness are especially precious," Li said at the opening of the China-Asean Business and Investment Summit in Nanning, Guangxi Zhuang autonomous region.

He added that the most important thing for trade and economic cooperation was the trustworthiness of parties and whether the market policies and environment were "fair, stable, transparent and foreseeable".

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"China has always treated counterparts wholeheartedly and with sincerity, and has been especially wholehearted to Asean countries," he said.

"We are willing to uphold our promises, to develop cooperation in all areas and to carry out practical moves on items of cooperation that have been agreed on."

The premier also underscored China's hopes to advance talks with the Association of Southeast Asian Nations on a "free trade area version 3.0", which would expand on the areas covered by the Regional Comprehensive Economic Partnership (RCEP).

China and the 10 members of Asean have signed up for RCEP, as have Australia, Japan, South Korea and New Zealand.

He also highlighted trade between China and Asean, which he said had grown more than 16-fold in the two decades since the summit was launched.

Li's address is the latest attempt by Beijing to assure its Southeast Asian neighbours that they have "priority" for China in a geopolitical environment that it describes as "turbulent" and "full of uncertainties", particularly in relation to the United States.

Li held several meetings with his Southeast Asian counterparts throughout the weekend on the sidelines of the four-day gathering, which ends on Tuesday.

In his meeting with his Vietnamese counterpart Pham Minh Chinh, Li said China hoped to "manage disputes" with Vietnam through communication and was determined to "defend righteousness and justice" with Hanoi.

A Chinese foreign ministry statement quoted Chinh as saying that the Vietnam-China comprehensive strategic partnership was his country's most valued external relationship.