Modern Chinese or japanese paintings?

Have six chinese or Japanese paintings. Looks like 3 of them are signed by one artist and the other 3 by a other artist, or is it one artist?
They have some age to them but no antiques. Any if about the seals or artist? They look like tourist items to me but I have been wrong before.

 

The second set is of some famous mountains in southern China, if memory serves. Not in Japan anyway. The rest...dunno.

 

The 2nd one "晓光" is the nick name of artist, whose full name is "许献廷" (Xu Xianting). He is an independent artist in China while not quite famous.

The 4th pic shows it was painted in 1999.
The 4th one "春韵" is the name of painting refers to rhythm of spring. The red seal is the name of artist. But I am sorry I cannot read them.

 

Thx so much Asian fever, you are a great help! I can name a few now and give one a title. These are maybe to modern to be of any great value. However I found a listed auction result of this artist so I'm sure they will be good to keep. I do like them they are very decorative. Thank you