Will eating self-heated rice on a bullet train alarm you?

Will eating self-heated rice on a bullet train alarm you?

​Bullet train self-heating rice will not alarm. Spontaneously heating rice emits water vapor, not smoke, so it won't set off an alarm. Convenience rice is a staple food that is produced by industrial scale and only needs to be cooked simply or eaten directly before consumption. It has the same flavor, taste and appearance as ordinary rice. Convenient rice is easy to eat and carry, with a natural rice flavor. There are four kinds of convenient rice: dehydrated, semi-dried, frozen and canned.