According to Asia Times:
Some 70% of the world's Christmas ornaments and other paraphernalia now originate in officially atheist mainland China. Tinsel, Santas, mistletoe and artificial trees of every shape and hue are churned out at a relentless pace by thousands of factory workers in Guangdong, Zhejiang and Jiangsu provinces...
According to a recent report on globalsources.com, a sourcing information website that specializes in China, the over 1,000 suppliers of Christmas lights in China are releasing "unique designs in diverse colors, styles and effects with greater frequency, to remain competitive amid an intense price war". Laser crystals and holograms are being pressed into use in the unrelenting quest for novelty...
China's Communist Party banned public Christmas celebrations at one point in 1993. But today, rather than being judged as a vehicle for insidious ideological pollution, Christmas is seen by Beijing as an opportunity for encouraging consumer spending.
According to AFP, via Taipei Times:
According to Customs figures, China exported US$1.6 billion worth of Christmas products last year, of which more than half went to the US, including seven artificial trees erected in the White House...
In the US alone, unless your family purchased a natural tree, you would have had a 70 percent chance of celebrating your Christmas with an artificial tree manufactured in Guangdong's Shenzhen City.
Finally, according to The Washington Times:
Imports from China account for 81 percent of all toys sold in the United States, says J. Craig Shearman, vice president for public relations at the National Retail Federation, a trade group in Washington.
It stands to reason that it is in China's best interests to promote the celebration of Christmas worldwide.