When Cuban sugar planters saw the abolitionist movement prevailing worldwide, they realised that African slavery was no longer a sustainable source of labour. They then searched the globe for substitutes, finding success in South China. The Chinese coolie trade to Cuba occurred between 1847 and 1874, during which time over 141,000 low-paid, low-skilled Chinese workers became indentured labourers. They sustained Cuban sugar production, among other vital economic activities. This paper examines how these Chinese workers contributed to Cuba’s labour transition from an enslaved to a free workforce. It argues that the substantial contributions of los colonos asiáticos, as the workers were known, went beyond their work in the sugar plantations: their minimally remunerated labour in key industries and usually unpaid work in public services made critical contributions to transforming the Spanish island’s economy and to meeting the ever-growing global demand for cash crops in the second half of the nineteenth century.