Before US' Treasury Secretary Janet Yellen laid out the US economic priorities on China on Thursday, the Chinese Ministry of Commerce said China and US commerce officials met in Beijing last week during which the two sides exchanged views on bilateral economic ties. The re-engagement of US and Chinese officials in certain areas such as business and climate could serve as an opportunity for the strained bilateral relations to turn into a positive direction, but Washington needs to show more sincerity for improving the ties, experts said.