Vanilla shenzhenica
Vanilla shenzhenica is a species of Vanilla native to Guangdong (Shenzhen and Huizhou) and Hong Kong in China. It used to be treated as a synonym of Vanilla somae, but it differs from the latter by having the flower not fully opening, with sepals/petals wider than 1.6 cm (up to 1 cm in V. somae) and a distinctly undulate purple-red lip (more or less flat-margined and pinkish yellow-green in V. somae) whose apical appendages are conical (clavate in V. somae). References 

shenzhenica
Flora of China
Flora of Hong Kong