Lo Wu has two written names in Chinese. The modern form, 羅湖, uses characters meaning roughly 'net lake.' The older form, 螺湖, uses a homophone that means 'shell lake' — the same consonant, the same vowel, a different tone. The two names point to a place defined by water: Lo Wu sits at the junction of the Sheung Yue River and the Sham Chun River, the latter forming the natural boundary between Hong Kong and Shenzhen. The Sham Chun River has itself been engineered: in 1995, Hong Kong and Shenzhen jointly straightened a 3.2-kilometer stretch near Lok Ma Chau and Liu Pok, replacing meandering river bends with new, wider channels as part of a shared environmental improvement project. To the east of Lo Wu sits Sandy Ridge — Sha Ling to locals — one of Hong Kong's major cemeteries, occupying the hill that faces the border. The landscape here is shaped by what the border requires: control points, closed areas, restricted roads, monitored hills.

Before the immigration halls, Lo Wu had a British Army camp at the base of Crest Hill — so named for a regimental badge carved into its slopes. For years, Royal Artillery survey units occupied largely tented accommodation there, with one specific duty: maintaining an observation post on the summit of Crest Hill to monitor into the People's Republic. In February 1950, during a period of Kuomintang attacks on the mainland launched from Formosa, a Kuomintang aircraft flew illegally over Hong Kong and bombed the railway line to Guangzhou beyond Lo Wu. The camp was also home to British Army mules, used as pack animals for patrols along the border. After the withdrawal of British forces in 1994, a group of horse enthusiasts took over the camp and established the Lo Wu Saddle Club, which opened to members and the public. It remains operating today — a riding school where the first equestrian instruction in Hong Kong was once given, housed on land where the army used to keep mules for border patrol.

The Lo Wu Immigration Control Point opened as the primary rail checkpoint between Hong Kong and mainland China and operates daily from 6:30 am to midnight. Of all passenger departures from Hong Kong overland to the mainland, 90 percent use the four land control points — Lo Wu, Lok Ma Chau, Man Kam To, and Sha Tau Kok. Lo Wu alone handles 85 percent of those departures, a concentration driven by the convenience of the MTR East Rail line, whose northern terminus sits directly at the crossing. The crossing's popularity has generated its own pressures: debates about extending to 24-hour service have focused on maintenance requirements, noise pollution, and the social implications of easier nighttime access. The facility handles more traffic because it can — it has the largest passenger-handling capacity of any Hong Kong land border point — but the infrastructure demands that capacity imposes are constant. The crossing, for the communities of Sheung Shui and Fanling nearby, has also reshaped retail patterns: cheaper goods and dining across the border have drawn purchasing power away from Hong Kong-side shops for years.

In 1952, Hong Kong established the Frontier Closed Area in response to illegal immigration and smuggling — a buffer zone along the full length of the border that required special permits to enter. Lo Wu fell within this zone, which meant the Hong Kong side of the crossing remained rural and undeveloped while the Shenzhen side of the river built itself into a major commercial district. The Luohu District of Shenzhen, directly across from Lo Wu, now hosts dense office development; Lo Wu village, on the Hong Kong side, remained isolated farmland, its access restricted, its development impossible. That enforced isolation produced an unintended conservation dividend: the closed area's 50-plus years of restricted access preserved fauna and flora that would otherwise have been built over. As the closed area has been progressively reduced since 2012, environmental groups have argued for the ecological value of the remaining buffer. Whether that argument prevails against development pressure at the border remains, as it has always been at Lo Wu, an open question.