中间文字与图片在flexbox-Centertextwithimagesinflexbox

CSS:

CSS:

#promocontent {
display: flex;                  /* establish flex container */
flex-direction: row;            /* default value; can be omitted */
flex-wrap: nowrap;              /* default value; can be omitted */
justify-content: space-between; /* switched from default (flex-start, see below) */
padding: 5px;
}

Now, I need to add text on the center-bottom of these images, something like:

现在，我需要在这些图片的中下方添加一些文字，比如:

header text