There are three features of Chinese tone contour.

汉语声调的曲拱特征有三。

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Adverbs in Modern Chinese tone very heterogeneous internal systems need to be carefully studied different categories.

现代汉语语气副词内部系统非常庞杂，需要分门别类地进行细致研究。

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This paper emphasizes the study of the factors effecting remarkably the Chinese tone, such as the basic frequency and so on.

重点研究了对汉语的语调影响较大的基频和语音的谐波结构等因素。

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In interviews with China Daily and China National Radio, other Chinese experts strike a more optimistic tone and believe that the US has already softened its stance and is still keeping channels of communication open with North Korea.

BBC: China media: North Korea speculation

Looking toward next week, market watchers said Chinese data will help to set the tone early.

FORBES: METALS OUTLOOK: Softer Tone For Gold Could Continue

Also helping market tone this morning, for the short term at least, was Chinese and UK manufacturing activity.

FORBES: Connect