text-combine-horizontal digits and all

HTML

<h1><span>中Eng</span>文lish</h1>

CSS

h1 {
    font: bold 3.3em sans-serif;
    text-shadow: 2px 2px 0 black, 4px 4px 0 white;
    display: inline-block;
    color: #ad2846;
    background-color: #d1d334;
    border: 5px solid #3d90a1;
    padding: .1em;
    
    -ms-writing-mode: tb-rl;
    -webkit-writing-mode: vertical-rl;
    -moz-writing-mode: vertical-rl;
    -ms-writing-mode: vertical-rl;
    writing-mode: vertical-rl;
    transform:rotate(180deg);
    text-orientation: sideways;

}

h1 span {
    -ms-text-combine-horizontal: all;
    transform:rotate(180deg);
    text-orientation: sideways;

}