Buddhist practices have had a significant influence on Daoist concepts such as shijie and bigu. Shijie, a Daoist technique for liberation from the physical body, may have been influenced by Buddhist ideas of transcending the physical form to achieve spiritual liberation. The concept of bigu, the avoidance of grains in Daoist practice, also shows parallels with Buddhist fasting practices, indicating a possible cross-pollination of ideas.

The interaction between Buddhism and Daoism has been dynamic, with both religions borrowing and supplementing each other's beliefs over time. This mutual influence is evident in various aspects, including philosophy, religious practices, and even linguistic strategies. For instance, Buddhists borrowed ideas from Daoism to help the Chinese comprehend Buddhist concepts more easily, and this exchange benefited both traditions.

The historical context of the Tang Dynasty also provides evidence of the religious interplay between Daoism and Buddhism, where both religions dominated the religious landscape and influenced the divine status of the dynasty. This period likely saw an increase in the exchange of ideas and practices between the two faiths.

In summary, the influence of Buddhist practices on Daoist concepts like shijie and bigu is a testament to the fluid nature of religious ideas and the willingness of both traditions to adapt and incorporate new concepts to enrich their own belief systems. For more detailed information, you can refer to resources like "Shijie (Taoism) - Wikipedia" [1] and "Buddhism in China - Asia Society" [2].

[1] Shijie (Taoism) - Wikipedia: https://en.wikipedia.org/wiki/Shijie_(Taoism) [2] Buddhism in China - Asia Society: https://asiasociety.org/buddhism-china