Didi Chuxing has returned to back a series D round for the bike sharing platform, which has now reached unicorn status.

China-based bicycle hire service Ofo today closed $450m in series D capital from a consortium that included ride sharing app provider Didi Chuxing, Bloomberg reported this morning.

The round was led by investment firm DST and also included Citic Private Equity, a subsidiary of investment management firm Citic Capital, Matrix Partners and Coatue Management. The deal values Ofo at more than $1bn.

Founded in 2014, Ofo operates an app that enables users to book bikes and unlock them through a…