As of Nov 1st, 2020, according to the official data from China government authorities, there are 8525 mosquito net factories in China. Most of them are located in Guangdong, Zhejiang, Fujian and Jiangsu area etc. 

Here are the top 8 mosquito net producers in China in terms of their production capacities, revenues and reputation at local markets: 

Yourmoon
Origin: Dongguan
东莞远梦家纺有限公司

Shuibao
Origin: Jiangmen
江门市睡宝纺织品有限公司

Luolai
Origin: Shanghai
上海罗莱家用纺织品有限公司

Gaorui
Origin: Huzhou
湖州高睿经编实业有限公司

Fuanna
Origin: Shenzhen 
深圳富安娜家居用品股份有限公司

Lotus
Origin: Guangzhou
广州荷花纺织装饰实业公司

Southbedding
Origin: Shanghai
上海南方寝饰科技有限公司

Changxiangzhi
Origin: Hangzhou
杭州长相知家纺科技有限公司

Source: www.portablemosquitonet.com