Some, like Damaris De Luna Sanchez, 11, move their hands the way a conductor directs an orchestra, slicing through the air to help them reach the proper intonations.

有些孩子，比如11岁的桑切斯，则像交响乐指挥家一样手臂在空中摇摆着，帮自己掌握汉语的声调。

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"I've been here for around 11 hours but the queue kept moving so I couldn't go to sleep, " said student Luna Zhang, 20.

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