It is not the first time proposals for North Korea to host competitions at the Games have been mooted, with the suggestion having been raised back in 2015.
But when asked about the suggestions, Chang said he was not in a position to talk about them.
The 78-year-old travelled with officials and athletes from the North Korean-led International Taekwondo Federation (ITF), whose Demonstration Team performed at the Opening Ceremony. North Korea has accused the US of escalating tensions with its actions and refers to its own missile launch tests as measures to safeguard its country, while Washington believes the joint military drills with Seoul are important to safeguard against any North Korean threat.
In Seoul on Friday he said he would discuss the idea of co-hosting the Winter Games with Olympic chief Thomas Bach when he meets him in South Korea next week. The South Korean sports minister has proposed forming a joint women's ice hockey team as a show of Korean unity.
"If North Korean athletes participate in the Pyeongchang Olympics, I think it would greatly contribute in realizing Olympic values, which are about bringing humanity together and promoting world peace", said Moon.
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The White House said it is hopeful a final bill will be finished before lawmakers leave Washington later this summer. However, the four senators do appear open to negotiations and amendments that could turn their "no" to a "yes".
North Korea has vowed to continue developing its defensive capabilities amid the reclusive country's concerns the US and South Korea will start a war.
Kim Jong-un, the supreme leader of North Korea.
According to the Korea Herald, he will discuss the prospect of North Korea hosting competitions at the Masikryong ski resort.
The recently elected progressive South Korean leader advocates balancing global economic sanctions imposed on the Kim Jong Un government in the North for its continued nuclear and missile provocations, with non-political outreach, including sports diplomacy, to build trust and facilitate communication.
President Donald Trump warned that a "major, major conflict" with North Korea is possible and the United States will respond if provoked.