Bar chart with more series to X-axis

My bar chart can't add more series to X-axis,and I hope to present effect like picture2
I have two series for X-axis,"period" and "plant",
"plant" has three categories and "period" has two categories,so the kinds will be six,
What's the reason cause it can't add?~
Can it be achieved?thanks!

Hi @summer02905
Have a look here: Is Multiple X Axis Possible?