Korea was similar to China in that it encouraged contacts with outsiders
killed all foreigners in its territory
was part of a vast trade network
discouraged contacts with outsiders

discouraged contacts with outsiders.

Explanation:

Prior to joining the World Trade Organization (WTO), China wasn't open about it's economic activities or policy to other countries across the world. This simply means the Chinese government was very secretive about the happening in it's country and as such wouldn't allow outsiders to see what it was doing or it's internal engagements.

However, joining the World Trade Organization (WTO) made them to be more open to other countries, which was a key factor for their unprecedented economic growth and development.

Hence, China was able to trade globally, capturing many markets and attracting foreign investment which boosted it's economy greatly

Additionally, Korea was similar to China in that it discouraged contacts with outsiders because it wasn't open to trade and diplomatic relations with other nations.

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