The Black and White Ghosts did not appear in the fourth season of 'Bad Men,' nor did they appear in the trailer for the fifth season. Although there was no specific time when the Black and White Ghosts went offline, it could be inferred that he went offline in the fourth or fifth season. Therefore, based on the information provided, it was impossible to determine the exact time when the Black and White Ghosts went offline.

There was no clear answer to the whereabouts of the Black and White Ghosts. Some people believed that they might be hiding in Rao Jiang, a mysterious place, to observe the situation and achieve their goals. In addition, there were also opinions that the Black and White Ghosts might have left the plot of " Bad Men " because the production team wanted to explore new characters and story lines, or because their story had already ended. "In short, based on the information provided, we can't be sure where the Black and White Ghosts went.
The Black and White Impermanences went to Rao Jiang in the end. In the plot of the fourth season of Painting of the Bad People of the Underworld, the Black and White Ghosts disappeared for a period of time, and the audience speculated about their whereabouts. According to an article in the search results, the Black and White Ghosts were probably hiding in Rao Jiang, waiting for the opportunity to reap the benefits. Rao Border was a dangerous place, but to the Black and White Ghosts, the more dangerous the place was, the safer it was. They might choose to wait patiently. No matter which side won, it would be a good time for them to find an opportunity. Thus, the Black and White Ghosts went to Rao Jiang.
The Black and White Ghosts not only appeared at night, but also during the day. Although it was generally believed that the Black Impermanence was active at night and the White Impermanence was active during the day, in fact, they were not afraid of the sun. Their mission was to capture people at fixed locations, not patrol, so there was no difference between day and night. Therefore, the Black and White Ghosts would also go out during the day.
The Black and White Impermanences were nicknamed the Soul Guide.
The Black and White Ghosts were called siblings on the surface in Painting of the Bad People of Jianghu, but they were not actually related by blood. They were two orphans adopted by General Chang Jin under Zhu Wen and later became the Black and White Impermanences under the Underworld Emperor. Therefore, according to the information provided, the Black and White Ghosts were not siblings.
There were many versions of the story of the Black and White Ghosts, but the most common story was that they were originally a pair of good brothers, named Fan Wujiu and Xie Bian. They lived in an ordinary village and were like brothers since they were young. One day, they went out to do some work and walked under a bridge. The sky was gray and it was about to rain heavily. White Impermanence wanted to go back and get the umbrella, so he asked Black Impermanence to wait under the bridge. After White Impermanence left, it began to rain heavily and the river began to rise. Black Impermanence didn't choose to leave. Instead, he continued to wait. When White Impermanence returned, he couldn't find Black Impermanence. White Impermanence watched his good brother being washed away by the flood and chose to hang himself on the bridge pillar. After the two of them died, they went to the King of Hell. In this story, the Black and White Ghosts were given this name by the King of Hell because of their loyalty and faith, and they became the great gods of the Underworld.
Seeing the Black and White Impermanence was a legendary phenomenon. According to different theories, it might have different meanings and omens. Seeing the Black and White Ghosts in a dream could mean that they might encounter difficulties or troubles recently, or even life-threatening. For married women and working women, this may mean that they face some restrictions or pressure in work or interpersonal relationships. For unmarried women, dreaming of the Black and White Ghosts pursuing them might mean that their family would interfere with their emotional life and might be arranged for a blind date. However, these explanations were based on superstition and folklore, and there was no scientific basis to prove their accuracy. Therefore, there was no clear conclusion as to the true meaning of seeing the Black and White Ghosts.