The latest data comes less than a month before the Belt and Road Forum for International Cooperation, which opens on May 14 in Beijing.
To achieve the ambitious goal, China took the lead in the establishment more than a year ago of the Asian Infrastructure Investment Bank.
Foreign Minister Wang's list includes some of China's most reliable allies - Russian President Vladimir Putin, Pakistani Prime Minister Nawaz Sharif and Cambodian Prime Minister Hun Sen.
Only one G7 leader is going to be attending the all-important summit on the issue next month, with the USA, the United Kingdom having declined to send their leaders.
He said that Germany and France expressed their desire to attend the Belt and Road Forum, but their leaders are unable to attend due to the elections in these states; however, he said, London, Paris, and Berlin plan to send their high-level representatives.
The countries sending presidents and prime ministers to the event are: Argentina, Belarus, Chile, Czech Republic, Indonesia, Kazakhstan, Kenya, Laos, Philippines, Russia, Switzerland, Turkey, Uzbekistan and Vietnam.
Wang said the upcoming edition will be the highest level worldwide forum to be held since the proposal of the initiative.
"One Belt, One Road is to date the most important public good China has given to the world, first proposed by China but for all countries to enjoy", Mr Wang said.
According to the foreign minister, Eurasia is the main region covered by the "One Belt, One Road" initiative, and the majority of participants represent this region, however, the framework of the initiative will be expanding. Indian officials, however, reportedly insist they won't participate in China's summit "until China agrees to make a clear statement that it does not support Pakistan's claim" to Kashmir, a disputed territory partially administered by both Pakistan and India that the China-Pakistan Economic Corridor passes through.
Wang dismissed those concerns, saying the Pakistan project had nothing to do with the dispute and India was welcome to participate in the New Silk Road.
Wang dropped the word "one" from the original name of the program, One Belt, One Road.
A senior Indonesian government official said China was aiming for a "spectacular" summit.
A new platform is needed to explore ways of cementing economic recoveries, creating new growth and improving infrastructure, Wang said. China will also work to build an worldwide cooperation platform for science, technology, and environmental protection, and enhanced exchanges and training of talent.
"This is a positive, cooperative conference, it shouldn't be politicized", Wang told reporters in Beijing, in response to a question asking if China felt insulted by the absence of top leaders from the USA and its allies, including Japan, Britain and Australia.
China will use the forum to build a more open and efficient global cooperation platform; a closer, stronger partnership network; and to push for a more just, reasonable and balanced worldwide governance system, Wang said.