AP News In Brief At 5:58 P.m. EST

Walking a fine line: Obama seeks Chinese help on global problems while supporting human rights

SHANGHAI (AP) — President Barack Obama is walking a tightrope on his first trip to China, seeking to enlist help in tackling urgent global problems while weighing when and how — or if — he should raise traditional human rights concerns.

Obama arrived in Shanghai late at night, in a driving rain, hustling through a phalanx of umbrella-holding dignitaries to reach his limousine. On Monday, the president is holding talks with local politicians and, in one of the marquee events of his weeklong Asian trip, conducting an American-style town hall discussion with Chinese university students.

Thirty years after the start of diplomatic relations between the two countries, the ties are growing — but remain mixed on virtually every front.

The two nations are partnering more than ever on battling global warming, but they still differ deeply over hard targets for reductions in the greenhouse-gas emissions that cause it. China has supported sterner sanctions to halt North Korea's nuclear weapons program, but it still balks at getting more aggressive about reining in Iran's uranium enrichment.