@prnksheela,
I was able to replicate the error. I will be creating a ticket for the development team.
Code sample with the issue:
private void Logic()
{
// Open document
Document doc = new Document();
// Create link
Page page = doc.Pages.Add();
//Create Rectangle Object
var rectangle = new Aspose.Pdf.Rectangle(20, 500, 120, 600);
// Create Link annotation object
LinkAnnotation linkFileEnglishFileName = new LinkAnnotation(page, rectangle);
linkFileEnglishFileName.Color = Aspose.Pdf.Color.FromRgb(System.Drawing.Color.Black);
linkFileEnglishFileName.Action = new GoToRemoteAction($"{PartialPath}_link.pdf", 1);
page.Annotations.Add(linkFileEnglishFileName);
//Create Rectangle Object
var rectangleTwo = new Aspose.Pdf.Rectangle(20, 100, 120, 200);
// Create Link annotation object
LinkAnnotation linkFileWithChineseCharacterInFileName = new LinkAnnotation(page, rectangleTwo);
linkFileWithChineseCharacterInFileName.Color = Aspose.Pdf.Color.FromRgb(System.Drawing.Color.Red);
linkFileWithChineseCharacterInFileName.Action = new GoToRemoteAction($"{PartialPath}_网站链接.pdf", 1);
page.Annotations.Add(linkFileWithChineseCharacterInFileName);
// Save updated document
doc.Save($"{PartialPath}_output.pdf");
}