Hi,
According domain name sales Chinese prefers non hyphenated coms but according whois Chinese keeps domains with multiple hyphens
4-4-4-4.com Chinese owner
5-5-5-5-5.com
6-6-6-6-6-6.com
7-7-7-7-7-7-7.com (mine) previously owned by Chinese registrant
8-8-8-8-8-8-8-8.com Chinese owner...