Detailed Instructions: You are given a concept, and a list of answers. You should generate a question about the concept that leads to the given answer(s).
Problem:concept: China answers: ['Madagascar', 'Angola', 'Algeria', 'Sudan', 'Tuvalu', 'Tanzania', 'Nepal', 'Djibouti', 'Laos', 'Sierra Leone']
Solution:
who are the main trading partners of china?