and administrative paperwork needed in order to use the bridge with their own vehicle. Delays and budget overruns The artificial island housing the Hong Kong Boundary Crossing Facilities (HKBCF) was reported drifting due to an unconventional method, hitherto unused in Hong Kong, for land reclamation using a row of circular steel cells pile-driven into the mud and filled with inert material to form a seawall. The drifting of parts of the reclaimed island allegedly caused a delay in the HZMB project. The Highways Department denied various reports of movement up to but admitted that parts of the reclaimed land had moved "up to six or seven metres", claiming that some movement was expected and safety had not been jeopardised. Mainland contractors also reportedly had difficulty constructing immersed tubes for their section of the project, with the director of the Guangdong National Development and Reform Commission stating that 2020 would be a difficult target to meet. By 2017, the Main Bridge of the HZMB project had experienced a cost overrun of about ¥10 billion, blamed on increased labour and material costs, as well as changes to the design and construction schemes. Worker deaths and injuries The number of deaths and injuries during the construction project came under scrutiny in Hong Kong. In addition to 9 fatalities on the mainland side, more than ten deaths were reported on the Hong Kong side of the construction project, plus between 234 and 600 injuries, depending on the source. In April 2017, the Construction Site Workers General Union, the Labour Party and the Confederation of Trade Unions demonstrated at the Central Government Complex, demanding the government take action. Lawmaker Fernando Cheung also expressed concern over the unknown death toll on the Chinese side of the project, stating: "the project is known as the 'bridge of blood and tears' and we are only talking about the Hong Kong side. We don't even know what is happening in China. I suppose the situation could be 10 times worse than that in Hong Kong." He said that the Hong Kong Government had a responsibility to consider worker safety on the Chinese side. Faked safety testing In 2017, Hong Kong's Independent Commission Against Corruption (ICAC) arrested 21 employees (2 senior executives, 14 laboratory technicians, and 5 laboratory assistants) of Jacobs China Limited, a contractor of the Civil Engineering and Development Department for falsifying concrete test results, thus potentially risking