What would be a negative effect of increased connections and trade between different countries?

Some local businesses might be having a hard time to compete with foreign product.

Explanation:

For example, trading relationships between South Korea and Vietnam allowed South Korea to market their smartphone product in that country, Currently, South Korea controlled more than 50% of the Smart Phone Market in Vietnam.

This made it really hard for local companies such as Vingroup (who also produced smartphone products) to obtain enough profit to sustain their operation.

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