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"But some teachers are not even sure what the four smaller stars in the national flag stand for," Tang said. "So they just teach their students about what they think is right."

"Children in Costa Rica are now taught Chinese in school," he said. "Most people around the world would like to speak Chinese, because China has become one of the most important markets in the world, and we need to communicate with each other."

"China is doing something that has never been done in the history of the world. A large country like China has expanded economic growth at a high level for decades," he said.

"China is an important member of the international community," Edwards said. "Its size, rising economic power, and influence make it an important partner in tackling the biggest global challenges. We have a policy of engagement with China and our approach will remain consistent, even if difficulties emerge."

"But now the situation has changed, with the US hoping China does not allow the yuan to depreciate," said Yu. "A weaker yuan would help boost China's export and reduce US exports to China."