The letter was unsigned, but Jiang Lu could tell at a glance that it was written by the Primordial Heavenly Venerable.
It wasn't because Jiang Lu was very familiar with the Primordial Heavenly Venerable or understood the tone of his speech, but rather his discerning eye uncovered all the hidden clues buried within.
For instance, the title of the letter, the words "Secret Message" were particularly striking.
Additionally, the letter always used "Second Sister" to refer to the Queen Mother of the West.
However, these clues were too obvious and did little to highlight Jiang Lu's intelligence, so let's set them aside for now.
The most crucial aspect was the golden seal of the Primordial Heavenly Venerable on the letter paper, located at the top right corner of each piece, about ten centimeters in size, almost like a watermark layered over the image underneath. If Jiang Lu had not recognized the traditional characters, he might have overlooked this vital detail.
