US President Joe Biden and Chinese leader Xi Jinping agreed Wednesday to take steps to curb fentanyl production and restore military communication during their summit Wednesday, a senior US official told CNN.

The results, which were expected ahead of the talks, amount to progress in improving the still-tense US-China relationship. But the leaders stopped short of a joint statement or other declaration of cooperation.

During the high-stakes summit, which wrapped up after roughly four hours, Biden made clear China should lean on Iran to avoid steps that would aggravate the tense situation in the Middle East. The leaders also made clear they wanted to stabilize their countries’ relationship after months of heightened tension.

Biden had aimed to use the meeting to put the US-China relationship on steadier footing after months of tension between the two superpowers.