cells source code：
src.zip (1.6 KB)
origin excel:
附件1.2 总部直接应对风险.xlsx.zip (13.5 KB)
before converted :
before converted.png (649.7 KB)
after converted :
after converted.jpg (591.8 KB)
Please have a check.
Thanks for the template file.
Please try our latest version/fix: Aspose.Cells for Java 22.5 (Download | Maven). I have tested using your samples with template file and it works ok and as expected.
Please try it and let us know your results. If you still find the issue, kindly share the output HTML and images with Aspose.Cells for Java 22.5. We will check your issue soon.