All MTR passengers in Hong Kong can get half-price tickets this weekend to compensate for serious delays on four lines in mid-October.

The MTR Corporation announced that adults traveling on November 3 and 4 will only pay children’s fares and HK$1 for the elderly, children and students, according to the railway operator’s press release.

The discount, however, is only for Octopus card holders and it excludes the Airport Express, MTR Feeder Bus, journeys to or from Lo Wu and Lok Ma Chau stations and East Rail Line First Class Premium.

Adi Lau Tin-shing, the MTR’s operations director, said at a Legislative Council meeting on Monday that about eight million people would benefit from the discounts, which are expected to total HK$30 million (US$3.82 million), Sing Tao Daily reported.

On October 16, hundreds of thousands of commuters were stuck for more than six hours in chaos on the Island Line, Kwun Tong Line, Tsuen Wan Line and Tseung Kwan O Line due to a serious breakdown on the signal system.

Lawmakers slammed the compensation offer as a “petty favor,” adding that those who were affected on that day were workers and it was ridiculous to offer discounts on a Saturday and Sunday, Apple Daily reported.

Lau responded that the special fares may attract additional passengers and add pressure to platform management and train services, especially during the weekday peak hours.

Read: MTR breakdown causes rush hour chaos in Hong Kong