Many people think that Duobao's later "Western Tathagata worships Sakyamuni" means that Duobao, the Taoist priest, later worshipped Buddhism as the Tathagata, like other disciples of Sanqing Buddhism. But in fact, the word "worship" means "weigh". Therefore, Duobao's later "Western Tathagata worships Sakyamuni" means that Daochang Duobao later "became a Western Tathagata called Sakyamuni". And Duobao is another name of Tathagata, called Duobao Tathagata.
The story of Taoist Duobao:
After sealing the gods, most of the immortals in the sky are disciples. As a disciple of interception, Daochang Duobao is a master elder brother. So he also has prestige in the sky, and can be closer to the gods in the sky. Only in this way can Buddhism gain greater benefits.
After several discussions, Taoist Duobao was reincarnated and reborn as Sakyamuni Buddha and Tathagata Buddha. Lao Tzu could have made his apprentice Du Xuan exorcist enter the Buddha. However, Taoism still needs the management of Du Xuan. Therefore, the Buddha of this Buddhist can only be achieved by Taoist priests.