But the diplomatic maneuvering has been subject to periodic flare-ups of tension over a variety of issues , including Taiwan and China 's support for Iran , a major supplier of China 's oil . ''
Taiwan
China
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China
Taiwan
/location/country/administrative_divisions
Taiwan
China
/location/administrative_division/country
China
Taiwan
/location/country/administrative_divisions
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Taiwan
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China
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Iran
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China