The country signed an agreement with Gavi, the co-leader of the project, on Thursday, China's foreign ministry said.
These vaccines will be delivered equally to all participating countries, proportional to their populations, initially prioritising healthcare workers then expanding to cover 20% of the population of participating countries.
Meanwhile, the main hurdle for COVAX, according to Ding, was the wait for one of the first vaccines to be declared a success.
"Vaccine deals are underway and we are fast approaching our initial fundraising target to jumpstart support for lower-income countries", GAVI's chief executive, Dr Seth Berkley, told Reuters in a statement.
It is not clear how much is China willing to bring on the table.
The World Health Organization, which also leads COVAX, welcomed the announcement, saying in a statement that "the number of countries joining the COVAX facility grows every day, and we are pleased to see China formally join". He explained the U.S.is now working on producing all six potential vaccines across more than 23 manufacturing facilities. Also, COVAX needs further financial commitment to manufacturing at least one successful vaccine for global access.
China, where the virus was first reported late a year ago, is also in talks with the World Health Organization to have its domestically made vaccines assessed for worldwide use.
Ding said it remains unclear whether the USA would join the initiative in the future. So far, 171 countries and economies have joined the platform.
The potential Covid-19 vaccine is being developed by J&J subsidiary, Janssen Pharmaceutical, which will be responsible for the supply.
In the phone call between the duo, "the importance of joint efforts to combat the spread of coronavirus was noted, including interaction on the Russian Sputnik V vaccine, which is now being clinically tested in the UAE", the Kremlin said. "The aim of COVAX is to ensure that 2 billion doses are manufactured and distributed equitably by the end of 2021", Ghebreyesus said.
"One or two of the vaccines in trials have to be stored at minus 60 [degrees Celsius]".
Chinese pharmaceutical company Sinovac, for example, recently said it wants to provide its vaccine to the world, including the USA and countries in Europe with stringent regulations that have prevented previous Chinese vaccines from being sold.
It has also inoculated hundreds of thousands of essential workers and other high-risk groups, though incomplete clinical trials have provoked safety concerns among experts.
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Delay of political dialogue on Nagorno-Karabakh unacceptable: Russian FM
It is meant to allow warring sides to swap prisoners and bodies of people killed in two weeks of fighting. According to the Armenian state, this attack has extended into Armenian territory.