Sungang Stationery Toys Wholesale Market, Baoan North Road, Luohu District, Shenzhen City, Guangdong Province. Shenzhen Balloon Wholesale Market Address Sungang Stationery Toy Wholesale Market, Bao 'an North Road, Luohu District, Shenzhen City, Guangdong Province, also known as Pengcheng, is a sub-provincial city, a city with separate plans, a megacity in Guangdong Province, a China Special Economic Zone approved by the State Council, a national economic center city and an international city.