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"Cities should make data available so academics and researchers can analyze it. You can't manage what you can't measure," he said.

"Contrary to the assertions of the USTR, we were hardly forced into these arrangements," he wrote on the Project Syndicate website on Tuesday.

"Chinese designs had helped me become a better 'editor', meaning reducing the elements in a composition to only what is essential," he said. "Anyone can add more to a design, but the best designers are the ones with the courage to remove elements to the core of the composition."

"Chinese companies should look beyond the domestic market in business expansion. They need to invest as quickly as possible in the global culture and creative industry," he said.

"China, President Xi, has been very strong in helping us to solve this problem," Trump said. "I have a very excellent, as you know, relationship with President Xi. And I think that relationship is very important as to what's happening with North Korea."