What is One-China policy?

-Backdrop-China slams U.S. President elect Trump's remarks on One-China policy.

-It is a foreign policy upheld by China.

-There are in fact 2 'Chinas':

One,People's Republic of China(PRC),or the mainland China we all know.

Two,Republic of China(RoC) or the country we know as Taiwan.

-The One-China policy refers to the policy or view that there is only one state called "China".

-As a policy, this means that countries seeking diplomatic relations with the PRC(Mainland China) must break official relations with the RoC(Taiwan) and vice versa.

-Caution!

>The One China policy is also different from the "One China principle", which is the principle that insists both Taiwan and mainland China are inalienable parts of a single "China."

-Trump wants the One China policy to be gone.

>He wants formal diplomatic relations with Taiwan,maybe because he wants more friends in South China Sea dispute who are aginst PRC

Source:Wikipedia