According to Tang Wanjia's inquiry, Zhengjinmao Huazhou Orange is a brand of Huazhou Orange, with some kinds of trademarks registered, such as food. Huazhou Citrus is a special product of Huazhou City, Maoming City, Guangdong Province, and a landmark product of chinese national geography. Exocarpium Citri Grandis is the immature or nearly mature dry skin of Huazhou pomelo, an arbor plant of Rutaceae and Citrus. Huazhou orange has many characteristics that oranges don't have, such as thick fluff and lingering fragrance. Huazhou orange has become a sought-after precious medicinal material because of its unique effects of invigorating stomach, promoting qi circulation, resolving phlegm and relieving cough. To sum up, Zhengjin Maozhou Orange is a trademark, not a patent.