I found the structrue of nature number, and know the secret of prime number! I have solved Goldbach Conjecture and infinite twins number existence problem. For any nature number n, we can caculate how many twins prime pairs(Tn) exsiting between n and 2n by below formula: Tn=1.317·( m^2 ) / n here m is the number of primes between n and 2n. It means, if there are m primes existing between n and 2n, there should be about Tn=1.317x(m^2)/n twins prime pairs exsiting between n and 2n. If n > 10^7, the error rate Er is less than +-1% for almost n, and Er must be less than +-2% for evry n. ©