HONG KONG—Senior Chinese officials told U.S. climate envoy John Kerry that continued U.S. hostility on a range of issues could jeopardize cooperation on fighting climate change, though Mr. Kerry said that working-level talks were productive in the run-up to a November climate summit.

Mr. Kerry, wrapping up a two-day visit to the northern port city of Tianjin, was warned repeatedly by his hosts that climate cooperation couldn’t be kept separate from worsening geopolitical ties between the two countries.

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