Protection of trade is the use of its political power and tariffs with the state.It's really a policy employed to safeguard the domestic industry and stop the competition of foreign products(Wu,2015).Its key level would be that the state adopts several steps to restrict imports to safeguard its domestic market place https://210list.com/story12629174/the-basic-principles-of-%E6%AF%95%E4%B8%9A%E8%AE%BA%E6%96%87%E4%BB%A3%E5%86%99