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"Trump is a crazy man," says Lionel Xu, who is surrounded by his company's mosquito repellent kits – many were once best sellers in Walmart stores in the United States.

"We are worried. What if Trump doesn't change his mind? That will be a dangerous thing for our factory," says Mr Xu.

When the BBC speaks to Mr Xu, he is getting ready to take some Australian buyers to lunch.

"Maybe it will get better in one or two months. Maybe, maybe," Mr Xu adds with his fingers crossed.

The painting, he added, also showed how Husain was influenced by his foreign travels, notably his 1952 trip to China which introduced him to the calligraphic brushwork of artists like Xu Beihong, traces of which can be seen in the painting's expressive strokes.