Special tempo indication in new version of lilypond

[胡海鹏 - Hu Haipeng]

Hello,
  I know how to write special tempo indication like 4= ca120 in old versions of lilypond. But since the new ones have included \tempo text + tempo function, I don't know how to adjust it. Moreover, the indication is quite different from the snippet. At the end of my overture, there are both 9/8 and 4/4, so I must add something like this:

Presto
q=160 (q.=120)

so that the conductor can correctly handle the meter changes. How to do that?

Regards
Haipeng