Achieving shijie or transcendence in Taoism involves various methods and substances. Some of the methods include:

1. Daoyin: A system of physical exercises and breathing techniques aimed at cultivating one's vital energy or qi.
2. Breathing Practices: Specific breathing exercises to control and balance qi.
3. Sexual Practices: Certain Taoist practices involve the use of sexual energy for spiritual cultivation.
4. Ritual Practices and Self-Cultivation: These are ways of framing and recodifying practices to adapt them to the individual's path to transcendence.
5. Pilgrimage: Engaging in a walking pilgrimage can engender a sense of sacredness through the bodily experience.

As for substances, while there isn't specific information on substances used for achieving shijie, Chinese medicine has historically used potent minerals and substances for healing and potentially for spiritual practices. It's important to note that the use of substances for such purposes should be approached with caution and respect for both safety and cultural context.

These methods and substances are part of the broader spectrum of Taoist practices aimed at achieving harmony with the Tao, the underlying principle of the universe, and ultimately, transcendence or liberation. For more detailed information, refer to sources like the Stanford Encyclopedia of Philosophy and Wikipedia.