In his formal address at the Vatican, Huang invoked the ancient philosopher Confucius to say that the world would see that China was "mending its ways" and stressed that the government had cracked down on offenders.
Dr Huang told journalists at the summit that the controversy was "ridiculous" and the use of organs from executed prisoners in China "is not allowed under any circumstances".
From the beginning of 2015, China imposed a total ban on the use of executed prisoners' organs for transplantation, Huang said, describing the process as "an arduous journey".
The Vatican has defended its decision to invite China to a conference on organ trafficking despite its record of using executed inmates as organ donors.
According to Huang, there used to be hundreds of foreigners coming to China every year for transplant tourism prior to the establishment of the new system.
The Pontifical Academy of Sciences (PAS) said that the invitation was given without confirmation whether China is still continuing the practice.
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Researchers have found though, that higher coil temperatures associated with dripping emit more harmful chemicals. Krishnan-Sarin, however, said more research is needed on the long- and short-term effects of e-cigarettes.
Dr Wendy Rogers, a medical ethics expert at Macquarie University in Australia and the chair of an advisory committee on tackling organ theft in China, slammed Dr Huang's presence as "shocking".
It also recommended the creation of global data banks to track all organ procurements and transplants and share data on transplant-related crimes so as to "yield a clearer understanding of their nature and scope and of the organization of the criminal networks involved". Nicholas Bequelin, the East Asia director for Amnesty International, said that even though the practice has been officially outlawed in China, it is hard to determine whether it has really stopped.
"Without transparency, verification of alleged reforms is impossible", said DAFOH executive director Dr. Torsten Trey, adding that those responsible for past abuses must also be held to account.
The pope was expected to meet summit delegates on Tuesday, but the audience did not go ahead amid speculation that the reaction against China's inclusion embarrassed the Vatican as it seeks to re-establish diplomatic relations with Beijing after more than 60 years.
Both the European Parliament and US Congress have recently condemned organ harvesting in China amid widespread concerns tissue is sourced from executed prisoners of conscience. The group included members who are Christians, ethnic Tibetans and Uighurs.
In 2007, China issued regulations on voluntary organ donation and banned organ trading.