"You tell them (Chinese), we are going to - either you are going to have to straighten out this North Korea problem or we are not going to be doing so much business with you," Trump, 69, told Fox News during a town hall in Indianapolis when asked how he would fix the North Korean problem as the country has recently claimed to have conducted hydrogen bomb test.
The real estate mogul said there would be a depression in Chinese economy of its business with the US comes down.
"They do not do so much business with us, they would have a depression the likes of which you have ever seen. We have tremendous power, economic power over China. I want to get along with China.
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He said that he would act very quick on this if elected to the White House.
Trump said the single biggest threat is weapons.
"If it were not for that capability and the incredible power of weaponry today, I would have been out of there a long time," he added.
North Korean leader Kim Jong Un has been intensifying his efforts to develop a long-range nuclear strike capability since the beginning of this yera. Since coming to power in 2012, Kim declared his father's bequest of a nuclear program as a crowning achievement and has changed the constitution to declare North Korea a nuclear state.