How to write the words next to the obituary in calligraphy?

The writing of "Zhu" originated from cursive script. This has a long history, even earlier than the history of regular script! However, the simplification of calligraphy does not mean the emergence of simplified characters in the true sense. Moreover, the words written next to the cursive script are sometimes written, and sometimes they are even omitted, without certain rules.

When was "Fu" regarded as the radical of regular script? This should start with the simplification of Chinese characters. However, the simplification of Chinese characters is full of twists and turns. Since the late Qing Dynasty, there have been several simplification of Chinese characters. The former died after a year or so, but only the simplified Chinese characters after the founding of New China did not die.