BEIJING (Reuters) - China’s trade with isolated North Korea rose more than 10 percent in the January-June period from a year earlier, a Chinese official said on Thursday, amid pressure from the United States for Beijing to pressurize its troublesome neighbor.

Last week U.S. President Donald Trump denounced China’s trade with North Korea, saying it had grown almost 40 percent in the first quarter, and cast doubt on whether Beijing was helping to counter the threat from North Korea.

China has repeatedly said it is fully enforcing United Nations sanctions on nuclear-armed North Korea and there is nothing wrong with what it terms “normal” trade with Pyongyang, referring to areas not covered by sanctions.

Chinese customs spokesman Huang Songping told a briefing on China’s overall trade figures that total trade with North Korea expanded by 10.5 percent to $2.55 billion in the first six months of the year.

While China’s imports from North Korea dropped 13.2 percent to $880 million in the period from January to June, exports to North Korea rose 29.1 percent to $1.67 billion, he said.

The exports were largely driven by textile products and other traditional labor-intensive goods not included on the United Nations embargo list, Huang added.

“As neighbors, China and North Korea maintain normal business and trade exchanges,” he said, adding that goods for ordinary people and those used for humanitarian reasons are not subject to sanctions.

Overall trade growth with North Korea slowed in June, compared with previous second-quarter months.

Trade in dollar terms with North Korea rose about 12 percent in June from a month earlier to $499 million, according to Reuters calculations based on previously released data.

The calculations do not reflect revisions to earlier figures that may not have been announced.

In May, trade with North Korea gained 14.5 percent from April to $443.5 million, previously released customs data show.

FILE PHOTO: A Chinese flag is seen in front of the Friendship bridge over the Yalu River connecting the North Korean town of Sinuiju and Dandong in China's Liaoning Province, April 1, 2017. REUTERS/Damir Sagolj/File Photo

ENFORCING RESOLUTIONS

Numbers showing an increase are not evidence that China is failing to enforce U.N. resolutions, with imports from North Korea falling every month since March, Huang added.

China suspended imports of North Korean coal in February, while imports of iron ore accord with relevant U.N. resolutions, he said.

“China customs have all along fully, accurately, conscientiously and strictly enforced relevant Security Council resolutions.”

Chinese Foreign Ministry spokesman Geng Shuang said U.N. resolutions did not cover iron and iron ore for civilian purposes, warning against confusion over U.N. sanctions being viewed as comprehensive sanctions on North Korea.

“For China to maintain normal economic relations with North Korea does not violate U.N. resolutions,” he told a daily news briefing.

Adding to the potential for further U.S.-China trade friction, China had a $25.4-billion trade surplus with the United States in June, up from $22.0 billion in May, customs data showed. The surplus with the United States was China’s largest since October 2015.

While China has been angered by North Korea’s repeated nuclear and missile tests, it also blames the United States and South Korea for worsening tension with their military exercises and not doing enough to get talks back on track, as Beijing has proposed.

Though Trump took a more conciliatory tone on the North Korea issue and China’s role at a meeting with Chinese President Xi Jinping on Saturday, Beijing has begun taking a harder rhetorical line with Washington in the past few days.

China’s Foreign Ministry this week urged a halt to what it called the “China responsibility theory” on North Korea, saying all parties needed to pull their weight.

Trade between China and North Korea has declined in both 2015 and 2016, a senior government-backed academic said in a front-page comment in the overseas edition of the official People’s Daily on Wednesday.

“Certain countries have no right to make wanton criticisms of China,” wrote Su Xiaohui of the Foreign Ministry think-tank, the China Institute of International Studies.

An “unexpected” jump in first-quarter trade between China and North Korea masked a declining trend, the state-run Global Times newspaper said last week.