The earliest source of development activities of the rise in the US mobile toilets network, can be traced back to the early automobiles and electric road trip. It comes from the travel trailer - a small unit on wheels, often used for camping. When this type of house is that because housing mobility requirements. Initially this house is mainly sold to those living locations uncertain group movable toilets, mobile nature of the work and life of the fixed housing for them is not very appropriate. From the beginning of the 1950s, the house was extended to become affordable housing, build and place for a long time in one place, even with the foundation stone of a permanent installation. Previously, the width of such housing units is 8 feet or less, but in 1956, 10 feet (3 meters) wide housing with the new term "activity room" was introduced together. This activity room is rectangular, made from painted aluminum, rather than travel trailers that streamlined shape, usually painted before assembly. This helps to distinguish between the activities room and travel trailers. In the fifties, the activities began popular in Europe, and then in the sixties began to develop to Canada, Japan and other developed countries. Activity room in the 1960's into China, the first time mainly for temporary housing, with the development of products, activities room gradually for office, booth, warehouse. After 2000, the real estate industry began rapid development, housing development opportunity for the emergence of activities. Free water will packaged mobile eco toilets flush-free packaged mobile eco-toilet [1] Free flush squat toilet with environmentally friendly packaging type, there are electric, no electric pedal, electric or foot, four-Toilet types, toilet with the casing, mechanical devices, storage closet, bags and so on. Squat toilet stool with stainless steel packing, shell and internal machinery are corrosion-resistant, resistant to moisture, acid and alkali resistance, salt spray, mildew. Person to operate a manual switch to the toilet stool packaged in a plastic bag and stored in a reservoir beneath the toilet with it the barrel, plastic bags will run automatically when the alarm using the toilet. Bag length of about 5 meters, use plastic bags per person from 80 to 100 mm, usually 50 people need to be replaced once a storage closet and a plastic bag. Films made by biodegradable packaging bag stool, pulled by mechanical means and closed bags, after those used as toilet stool with the bag down into the reservoir will barrel, toilet bag updating pit surface, the closing means closed again avoid odor discharge, and after not rinse. Applicable to public toilets in case of water supply facilities inconvenience meet people like to use the habit of squatting in public places. Toilet with housing, pressure-shaped panels are made of stainless steel, welding processing, with sufficient strength and rigidity of mobile toilets, durable. Foot pedal and equipped with a mechanical drive mechanism, can be used without electricity; installation of pneumatic strut inside a toilet, positioning support, easy to replace, install a plastic bag, and easy to repair, and maintenance. Mobile toilets _ Zhengzhou Kwong Tak green (certified) _ portable toilets provided by the Environmental Protection Equipment Co., Ltd., Zhengzhou-German. Zhengzhou-German Environmental Protection Equipment Co., Ltd. (www.ydhbcs.com) is a leader in Zhengzhou, public sanitation facilities, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Zhengzhou-German leadership in environmental protection with the staff warmly welcome all inquiries negotiations to create a better environment Zhengzhou Guangde future.