The title of Zhao Yi's fourth paper was quite long, with the main title being "Bounded Interval of Primes" and the subtitle being "Proof of the Existence of Infinite Prime Combinations Less Than or Equal to 246".
The content was as the title suggested.
To a layman, the content seemed to bear little relation to the twin prime conjecture, yet in fact they were directly associated, as the twin prime conjecture could be loosely translated as, "Can we find a positive number so that there are infinitely many pairs of primes less than this given positive number?"
In the conjecture of twin primes, this number is 2.
Zhao Yi's paper demonstrated that this positive integer is less than or equal to 246.
The difference between the two is quite significant.