Why doesn't it recognize Cyrillic when converting HTMl to PDF (Django 3.2)?

Question

Django

When converting HTML to PDF, I encountered a problem with Cyrillic recognition. Django 3.2 website (Python 3.7)
I use xhtml2pdf for generation.
The user fills out a form on the site, and after that, it must be printed. The file is uploaded, but instead of Russian text there are squares ■■■■■■■ ■■■■■■

def pdf_create(request):
    ty = Technical_Y.objects.all()
    template_path = 'my.html'
    context = {'ty': ty}
    response = HttpResponse(content_type='application/pdf')
    response['Content-Disposition'] = 'attachment; filename="my.pdf"'
    template = get_template(template_path)
    html = template.render(context)

    pisa_status = pisa.CreatePDF(html, dest=response)
    if pisa_status.err:
        return HttpResponse(html)
    return response

Answer 1

Because the font used to generate the pdf does not support Cyrillic characters.