The CEO of Apple on Wednesday said he was confident that mobile applications censored in China, including Skype and other similar calling apps, would eventually be unblocked.

Speaking at the Fortune Global Forum, which kicked off Wednesday in Guangzhou in China, Tim Cook expressed his "optimism" about the opening-up of China, which he said had changed a lot in the last 25 years.

After being asked about the ways in which the United States tech giant deals with censorship in China, the world's biggest market, Cook declared that he believed "strongly in freedoms" and that it was important to "get in the arena because nothing ever changes from the sidelines."

However, the CEO said that when a company decides to enter a country and participate in its market, it is "subject to the laws and regulations of that country."

In November, popular communications application Skype and other similar calling apps were removed from Apple's app store in China and other platforms due to an order by the government blocking their use.

The more than 700 million internet users in China fear that the internet censorship campaign by the Chinese authorities may also affect virtual private network (VPN) programs, used to access censored content in the country.

Far from criticizing the world's second largest economy, Cook praised China's efforts in eradicating poverty as well as its manufacturing capabilities and innovation.

Cook also denied that companies come to China to operate due to its low labor costs, saying it is the workforce's high skill levels which attract foreign investment.