Inclusion criteria

1. Aged 18 years or older.

2. Individuals meeting the following criteria:

   i. Healthy volunteers; ii. Suspected presence of gastrointestinal diseases, with one or more of the following clinical symptoms: abdominal pain, nausea, vomiting, hematemesis, black or bloody stools, loss of appetite, bloating, or indigestion; iii. Follow-up of gastric lesions post-endoscopic resection.

3. Willing to participate voluntarily in the clinical trial and provide written informed consent.

4. Capable of communicating with researchers and complying with trial requirements.

Exclusion criteria

1. Pregnant individuals.
2. Individuals at high risk of gastrointestinal obstruction, including those identified as being at risk of gastrointestinal stenosis based on the Gastrointestinal Stenosis Assessment Form, those in whom gastrointestinal obstruction cannot be clinically excluded, or individuals with a history of gastrointestinal surgery, severe motor dysfunction, or pseudobulbar palsy.
3. Individuals with swallowing dysfunction.
4. Individuals deemed unfit for surgery or unwilling to undergo any surgical procedures.
5. Participants who are unable to comprehend and/or comply with physician instructions during the examination.
6. Individuals with other medical risks that contraindicate the use of a capsule gastric endoscopy system, or those deemed unsuitable for participation in this study at the discretion of the investigator.