1+ 1 refers to Goldbach's conjecture, that is, every even number greater than or equal to 6 can be expressed as the sum of two odd prime numbers.

Goldbach's conjecture has not been solved yet, and the best result at present is 1+2 proved by Chen Jingrun, that is, every even number large enough can be expressed as the sum of two odd numbers, one of which is a prime number, the other is a prime number, or the product of two prime numbers.

Therefore, there is no 1+ 1 proved by Hua.