There are literally hundreds, if not thousands of commercially prepared hot sauces in China. I guess most people know 老干妈 (lǎo gān mā) but there are many more which are worth exploring. Many people and many restaurants also make their own.
My own favourite is this. It may not technically qualify as a sauce (I'm not sure what criteria are being applied) but I certainly use it like a sauce - almost every day.
Known as 剁辣椒 (duò là jiāo), literally "chopped hot peppers", the ingredients are chilli peppers, water, salt, garlic, MSG and some preservatives - much like a sauce. It is from Changsha, capital of Hunan province, one of China's spiciest provinces and 坛坛香 (tán tán xiāng) is the largest chilli processing company in the province and has several products. The company name refers to 'earthern jar fragrance' as chilli sauce was traditionally made in earthern jars as can be seen in their logo. Now it's made in traditional factories.
I don't know for sure that it's exported, but it would surprise me if not .
