Chinese ride-hailing firm Didi Global Inc apologized for its app malfunction earlier this week and will launch a 10 yuan ($1.4) taxi discount coupon for each user, the company said on its social media account on Wednesday.

The apology came as Didi's ride-hailing app reported a service breakdown affecting users in major cities like Beijing and Shanghai on Monday evening.

The company said that the malfunction was due to "a failure of underlying system software" rather than "a cyberattack", and all services were now fully restored.

The company will carry out an in-depth technical risk investigation and upgrades to ensure the service's stability and avoid a recurrence, it said.