Guangzhou Pharmaceutical Group said on June 28 said that it is cooperating with food companies to produce the herbal tea Wanglaoji, also known as Wong Lo Kat.

More than 30 food companies, including Taiwan's Uni-President China Holdings and Xiamen Yinlu Foods Group, have signed contracts with the Guangzhou-based company to produce and package the herbal tea, the company said.

Guangzhou Pharmaceutical regained the Wong Lo Kat herbal tea trademark in May, after the China International Economic and Trade Arbitration Commission ruled that JDB Group, which ran the brand since 1997, was not authorized to use it.