For some time before the period of rapid industrialisation occurring in Jurong throughout the 1960s, Jurong was already a host to several businesses in the heavy industry (primarily dealing with construction and manufacturing), most notably, the brickwork industrial sector. Local businesses involving in brick manufacturing and earthenware production were largely set up around Yunnan in Jurong West, where the soil conditions there could yield much clay and terracotta. Although almost all of these factories and industries closed down over the years (most were shut down by the late 1990s and early 2000s), the brickwork industry remains strong (primarily in the form of its past and its legacy) in Jurong even to this day.