By introducing artificial intelligence into Chinese medicine tongue diagnosis, we collated and collected tongue images, anxiety and depression scales and gastroscopy reports, mined and analysed the correlation between tongue images and bile reflux and anxiety and depression and constructed a prediction model to analyse the possibility of predicting bile reflux and anxiety and depression in patients based on tongue images.

Firstly, after the patient signs the informed consent form, the researcher will collect pictures of the patient's tongue and obtain basic information about the patient.

Second, the patients are scored on the Anxiety and Depression Scale.

Thirdly, after the patient undergoes gastroscopy, the patient's gastroscopy report is obtained.

Finally, the patient's tongue image, information and gastroscopy report are matched to construct an artificial intelligence model of tongue image and bile reflux and anxiety and depression, and the quality of the model is assessed.

Inclusion Criteria:

• Patients aged 18 to 80 years who wish to undergo gastroscopy.
• Patients have given their informed consent and signed the informed consent form.

Exclusion Criteria:

• Serious heart, liver, kidney or other underlying illness, or mental illness.
• Patients taking anti-anxiety or depression medication within 3 months.
• Current H. pylori infection.
• History of surgery on the digestive or biliary tract.
• Peptic ulcer, malignant tumour of the digestive tract, etc.
• Patients taking bismuth or other staining medications.
• Pregnant or lactating women.

Patients aged 18-80 years who will undergo gastroscopy and who fulfil the inclusion criteria and do not fulfil the exclusion criteria.