Table:
| 2.1 Office Buildings |  |  |
| --- | --- | --- |
| Indicators | For the year ended 31 December |  |
|  | 2019 | 2018 |
| Total energy consumption (MWh) | 205,092.26 | 167,488.48 |
| Direct energy consumption (MWh) | 19,144.17 | 12,852.04 |
| Including: Gasoline (MWh) | 805.77 | 780.24 |
| Diesel (MWh) | 41.33 | 42.10 |
| Natural gas (MWh) | 18,297.07 | 12,029.70 |
| Indirect energy consumption (MWh) | 185,948.09 | 154,636.44 |
| Including: Purchased electricity (MWh) | 185,948.09 | 154,636.44 |
| Total energy consumption per employee (MWh per employee) | 3.44 | 3.28 |
| Total energy consumption per floor area (MWh per square metre) | 0.12 | 0.14 |
| Running water consumption (tonnes) | 1,283,749.73 | 973,413.06 |
| Running water consumption per employee (tonnes per employee) | 21.52 | 19.07 |
| Recycled water consumption (tonnes) | 4,076 | 5,461 |
Paragraphs:
Note: The scope of use of resources data is appended to include 12 new office buildings which were put into operation in 2019.
Total energy consumption is calculated based on the data of purchased electricity and fuel with reference to the coefficients in the National Standards of the PRC “General Principles for Calculation of the Comprehensive Energy Consumption (GB/T 2589-2008)”.
The Group’s water supply resources are from the municipal water supply.
Recycled water consumption is the reclaimed domestic water treated by the wastewater treatment system equipped at Tencent Tower A and Tower B in Chengdu.
Data of diesel consumption reported above only covers the data centres whose diesel fees are directly borne by the Group.
Average PUE (Power Usage Efficiency) is the annual average data of PUE of the Group’s data centres. PUE, an indicator of the power efficiency of a data centre, is the ratio of total facility energy over IT equipment energy.
Data of running water consumption reported above only covers those data centres wholly used by the Group where operators could provide such data.
Data of packaging materials is not applicable to the Group
Question:
What is the change between indirect energy consumption (MWh) in 2018 and 2019 year end?
Answer: 185948.09-154636.44 = 31311.65