Italic&Bold?

Headline？//space is of no influence

Headline？//#<=6

PS:

这是一级标题

这是二级标题

这是三级标题

这是三级标题

这是三级标题

这是三级标题

Above is line1.
Bold？

Above is line2.(A different synax from that of line1).

PS:

This is Normal Type.
This is Italic Type.
This is Italic Type.
This is Bold Type.
This is Italic & Bold Type.
This is Delete Type.