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- China's president is seeking to exploit differences among Western allies, analysts say.
- Some European countries want to maintain stronger trade links to China than the US does.
- After a trip to China, France's President Emmanuel Macron said it's important not to be a US "vassal."
French President Emmanuel Macron and US President Joe Biden have been so effusive in their praise for each other their relationship has been dubbed a "bromance" by some observers.
But that friendship may have soured after Macron made comments likely to irk Biden following his recent state visit to China, the US' arch global rival.