Chan Buddhism, also known as Original Chinese Zen, is a branch of Mahayana Buddhism that originated in China during the Tang dynasty. It is a school of thought that emphasizes the direct experience of enlightenment and the practice of meditation as the means to achieve it. Unlike other forms of Buddhism, Chan does not rely heavily on written texts or scriptures. However, there are some specific texts that are considered important in Chan Buddhism.

The most well-known text in Chan Buddhism is the Platform Sutra, also known as the "Sutra of Hui Neng." This text is attributed to the sixth patriarch of Chan, Hui Neng, and is considered to be a central text in the Chan tradition. It contains the teachings of Hui Neng, including his famous statement, "The mind is Buddha." This text emphasizes the importance of direct experience and the rejection of formal teachings and rituals.

Another important text in Chan Buddhism is the Diamond Sutra, which is one of the most widely read and studied sutras in Mahayana Buddhism. This text is believed to have been taught by the Buddha himself and contains teachings on emptiness and the nature of reality. In Chan Buddhism, the Diamond Sutra is often used as a tool for meditation and contemplation.

The Lankavatara Sutra is also considered an important text in Chan Buddhism. It is believed to have been taught by the Buddha to the Bodhisattva Mahamati and contains teachings on the nature of mind and consciousness. This text is often used in Chan meditation practices to help practitioners understand the nature of the mind and its relationship to enlightenment.

In addition to these texts, there are also various koans, or paradoxical riddles, that are used in Chan Buddhism as a means of meditation and contemplation. These koans are meant to challenge the mind and break through conventional thinking in order to reach a state of enlightenment.

However, it is important to note that in Chan Buddhism, these texts and koans are not seen as the ultimate truth or the only means to enlightenment. The emphasis is on the direct experience of enlightenment through meditation and self-inquiry, rather than relying on external texts or teachings.

In conclusion, while there are some specific texts and scriptures that are considered important in Chan Buddhism, they are not the main focus of the practice. The emphasis is on the direct experience of enlightenment and the use of meditation and koans as tools to reach this state.