The Chinese Rally Champion died of alcohol poisoning at the age of 26.
"It’s a very big shock, not only for me but for all that knew him," McLoughlin told RallySport Mag.
"I have spent the last six years co-driving for Dong and we have had great success, winning three Chinese Championships and last year we both achieved a life long dream, competing in Rally Great Britain in an official Ford Focus World Rally Car.
"He was a great guy and a great mate and will be sorely missed," he said.
McLoughlin flies to China today (Friday) for Dong's funeral, to be held on Saturday.
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