2 sentences for 大关 (dà​guān — milestone)

1. 股指今日突破了三千点大关。

   gǔ​zhǐ jīn​rì tū​pò le sān​qiān diǎn dà​guān.

   The stock index broke the 3,000-point mark today.

   Source: Dong Chinese Dictionary

2. 该公司的年产值终于突破了亿元大关。

   gāi gōng​sī de nián chǎn​zhí zhōng​yú tū​pò le yì yuán dà​guān.

   The company's annual output value finally broke the 100 million yuan mark.

   Source: Dong Chinese Dictionary