Toilets in soft sleeper K trains

Hello.

Do soft sleeper cabins in K types have western toilets? Particularly how about
1. K1363 (Beijing - Xian)
2. K318 (Xian - Guilin)
3. K21 (Beijing - Guilin)

Do hard sleepers in Z types have western toilets? I'm considering
4. Z19 (Beijing - Xian)
5. Z5 (Beijing - Guilin)
6. Z335 (Beijing - Guilin)

Thanks