Lychee fruits (L. chinensis Sonn. var. Nuomi Ci) were purchased from a fruit wholesale centre in Singapore. Three and half litres of lychee juice were obtained, adjusted (Brix from 16.1% to around 20.0% with food grade pure sucrose, pH from 5.6 to around 3.4 with 500 g/L food grade DL-malic acid) and filter-sterilised as described before (Chen & Liu, 2014).