The Asian Infrastructure Investment Bank (AIIB) will invest 1.09 billion U.S. dollars in six projects in countries of the Association of Southeast Asian Nations (ASEAN), AIIB President Jin Liqun said.

The bank will play a bigger role in promoting interconnectivity between China, ASEAN and other Asian countries, Jin said at the 16th China-ASEAN Expo in Nanning, capital of south China's Guangxi Zhuang Autonomous Region.

In the past four years, the AIIB has invested a total of one billion U.S. dollars in 10 projects in six ASEAN countries, according to Jin.

"I am confident that members of ASEAN will gain greater benefits and dividends from our cooperation," Jin said, highlighting the role of the Belt and Road Initiative in boosting interconnectivity in the ASEAN region.

Headquartered in Beijing, AIIB is a China-initiated multilateral development bank which focuses on infrastructure investment.

Beginning operation in 2016, the bank has expanded its membership to 100 and approved 46 loan projects with a total of 8.5 billion U.S. dollars for its 18 members.