premise: Mongolian President Nambaryn Enkhbayar, who will start a week-long visit to China on Sunday, said here that his country is willing to promote bilateral relations with China.
  "Mongolia's major foreign policy is to boost bilateral relations with China and Russia. Mongolia attaches importance to ties with China," Enkhbayar said in an interview with Xinhua before his trip to China.
  "The political relationship between Mongolia and China has developed healthily," he noted.
  He also said the bilateral economic and trade cooperation had seen rapid development and that his government is implementing big projects funded by Chinese loans.
   What does bilaterial relations with China refer to?
hypothesis: bilateral economic and trade cooperation