Subject + 入 + Object
入 (rù) is a classical and formal verb meaning "to enter." It is more literary than the everyday word 进 (jìn) and often appears in compound words and set phrases such as 入市 (to enter the market), 入学 (to enroll in school), or 入口 (entrance).
新生九月份入学,需要提前准备好材料。
xīnshēng jiǔ yuèfèn rùxué, xūyào tíqián zhǔnbèi hǎo cáiliào.
New students enroll in September and need to prepare their materials in advance.
这家公司刚入市不久,发展势头很猛。
zhè jiā gōngsī gāng rùshì bùjiǔ, fāzhǎn shìtóu hěn měng.
This company just entered the market not long ago, and its growth momentum is very strong.
旅客请从正门入场,不要走侧门。
lǚkè qǐng cóng zhèngmén rùchǎng, bùyào zǒu cèmén.
Passengers, please enter through the main entrance and do not use the side door.