why now international trade so difficulty to deal ?

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About 20 years ago ,China begin to open reform and from there time, china factory not only do domestic business, also try to do foreign business, so that the factory which locate in coast city begin , as they near sea port so very easy for transport , and many many factory most are small factory are emerge at this time, some main business are foreign market, at that time as do much demand on international market, so if you products have quality and also price not very high, it is so easy to earn profit, and also easy to find cusotmers, but as time fly, now days all china fild have so much volume factory, even one products at same cith have more than 100 factory , so that make the competition is so cruel, such as one products, you sale 10 dollors, so i will sale 9.5dollor, then i will sale 9dollors,at last even this products basic cost need 8 dollor, but still have many factory hope to sale less than 8 , such 7.8. 7.5 dollor for customers it make the market so bad, as i have do foreign business for nealy 10 years, now i hate this, i felt it is very nausea