Everyone please stand up, the national anthem will play.
Tips
grammar
站起来 is a classic directional-complement construction: 站 (stand) + 起来 (rise up). The 起来 adds 'upward' motion. Also used metaphorically - Mao's famous 1949 line 中国人民从此站起来了 ('The Chinese people have stood up') uses this exact structure.
