The goal of this clinical trial is to verify the safety and efficacy of Oral Contrast Agent for Sonography produced by Shandong Baiduo Medical Instruments Co., LTD.

The goal of this clinical trial is to verify the safety and efficacy of Oral Contrast Agent for Sonography produced by Shandong Baiduo Medical Instruments Co., LTD.

Participants will Ultrasound was administered with Oral Contrast Agent for Sonography and observed for 2 days.

The investigators will compare Oral Contrast Agent for Sonography produced by Huzhou East Asia Medical Supplies Co., LTD to see if the safety and efficacy of Oral Contrast Agent for Sonography produced by Shandong Baiduo Medical Instruments Co., LTD

Inclusion Criteria:

1. subjects whose physicians recommend oral gastrointestinal CEUS;
2. subjects aged 18-80 years;
3. The subject or guardian can understand the purpose of the study, voluntarily sign the informed consent, and agree to the clinical follow-up;

Exclusion Criteria:

1. Pregnant and lactating women;
2. Subjects with dysphagia;
3. Subjects suspected of gastric bleeding, gastrointestinal perforation, intestinal disorders or gastrointestinal obstruction;
4. Subjects who are expected to receive surgery within 60 hours;
5. Subjects who have received gastroscopy within 24 hours;
6. subjects deemed unsuitable for the study by the researcher;
7. Subjects who have participated in other drug or device clinical trials and have not completed the expected primary endpoint follow-up of the clinical trials in which they participated.