As I have said many times, Chinese like two-character names. Its cultural. The implication is 2N (and 2L) names are popular. 2N + simple English word is acceptable. This is particularly evident in the case of 51Talk.com
Another suggestion is to think of simple English words to go with the numbers. For example, words such as job, car, money, baby, bus, taxi, food, and tv are easy to remember.
Read MoreWhile this is not a full-scale market study, the two examples do suggest the potential of 2N+English .com domain names for business use...