Fuzhou-based China Agrotech will kick off marketing on Tuesday for a planned $80 million listing on the Growth Enterprise Market (GEM), according to sources. The company, which is the mainland's sole producer of 'regulatory-type' plant-growth supplements, earned about $6 million in net profit for the year to June 30, a source said. Regulatory-type products are bio-chemicals which strengthen growth and enhance the quality of plants by affecting the microstructure of plant cells. They have a similar effect to vitamins for humans. The technology for making them is considered more advanced than for hormone-type plant-growth supplements, which are produced by more than 100 mainland firms. China Agrotech's turnover of about $20 million last year was almost equally split between plant-growth regulators for fruit and vegetables. It is expected to register a several-fold increase in net profit this year, thanks to a monopoly on its market segment. It plans to use the listing proceeds to expand existing production lines and to develop new lines. The float, sponsored by ICEA Capital, is among four approved by the stock exchange to be the first batch of GEM listings. Its debut is slated for the week of November 22.