SHANGHAI — The official newspaper of a Chinese province adjoining North Korea published a full page of blunt advice on Wednesday about what to do in case of a nuclear explosion or radioactive fallout, from hiding indoors to bathing quickly with soap.

The newspaper, Jilin Daily, printed the advice as the United States and South Korea were conducting extensive military exercises this week, and after President Trump repeatedly threatened to take unspecified action if North Korea did not agree to halt its nuclear weapons and ballistic missile programs. The publication came less than a week after Hawaii resumed testing of a Cold War-era warning system designed to alert residents of an imminent nuclear attack.

The advice published by the newspaper emphasized ways for residents to minimize their exposure to radioactive fallout. The suggestions, including cartoons vaguely reminiscent of those published in the United States during the 1950s, emphasized taking shelter indoors, washing off suspected radioactive dust from exposed body parts and shoes, and taking other precautions consistent with past tips from civil defense experts in the West.

Tensions rose a week ago when North Korea tested an intercontinental ballistic missile that flew higher and longer than its previous tests. Its government subsequently declared that the missile could deliver heavy nuclear warheads anywhere in the continental United States.

Residents of Jilin province, which abuts North Korea and Russia, had a jostling reminder of the dangers of nuclear detonations in early September, when the province was physically shaken by an earthquake set off by what North Korea described as a successful test of a hydrogen bomb. Scientists subsequently warned that the test had been so powerful that further tests underneath the same North Korean mountain could cause part of the mountain to collapse, releasing a cloud of radiation that could drift across the border into Jilin.

Jilin is one of two Chinese provinces along the North Korean border — the other is Liaoning, which had not yet issued a comparable public warning. North Korea’s nuclear test site is close to the border with Jilin, and the nuclear test in early September has left residents with lingering anxiety.

Publication of the civil defense advice caused a flurry of discussion on social media in China, and official news media sought to discourage speculation that a nuclear conflict might be imminent. The nationalistic Global Times said that China was trying hard to avert a conflict on the Korean Peninsula, while adding, “Even if war happens on the peninsula, our nation will try its best to make sure the war has the least possible impact on our northeastern areas.”

Xu Yucheng, the deputy chief of Jilin’s civil air defense office, told the Beijing News that the information had been provided by the province’s civil air defense authorities and was consistent with other countries’ efforts to use mass media to spread knowledge about how to mitigate the effects of nuclear explosions.