Why didn't China win the World Table Tennis Championships in mixed doubles?

In the 20th/Kloc-7th World Table Tennis Championships, China did not send a pure China team, but only two transnational teams, namely: Fang Bo/Sorgia (German) and Gross (Danish)/Feng Yalan. The final result is as follows:

In the finals of 1 and 1/8, Gross (Denmark)/Feng Yalan 3-4 (8-1,8- 1 1,1.

2. In the semi-final, Fang Bo/Solga (Germany) 3-4 (13-1,14-12,5-11,

Remarks: The mixed doubles final of the 20th17th World Table Tennis Championships was won by Ishikawa Kasumi/Yoshimura Maharu.