Natalie

Thank you for your kind reply! As it turned out, you are not quite right. There is a solution, and I’ve already used it successfully.
In .htaccess before # BEGIN WordPress I wrote the following:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_URI} ^/news/111(\d+)\.html
RewriteRule . /index.php?p=%1 [L]
</IfModule>

This code was created for my case by a Russian guy (many thanks to him). Perhaps someone may need it.