See the data version history.
The data of old versions are available only if the versions are included in Yearly fixed datasets.

 CO _ HKG2034 _ surface - insitu _ PolyU _ data1

Updated Date	Version † met : with meteorological data	Details
2024-12-24	0061-2034-3001-01-01-9999 -2025-01-01-0101	The latest version
2020-04-22	0061-2034-3001-01-01-9999 -2020-04-21-1650	Included in Yearly Fixed Dataset 2024
2018-10-23	0061-2034-3001-01-01-9999 -2018-10-23-0711	Included in Yearly Fixed Dataset 2019
2018-06-13	0061-2034-3001-01-01-9999 -2018-02-26-1030