treasure, valuables
琛 centers on precious objects: treasure and valuables, especially in a refined or rare sense.
琛 combines 王 (jade, a precious material) with 罙, which likely contributes the sound. The character expresses treasure or valuables, with the jade radical reinforcing the meaning.
The left side is 王 (jade), a precious stone. The right side 罙 looks like a deep container. Imagine a deep box full of jade and other treasures.
For チン, picture a treasure chest made of tin: tin -> チン, and inside are precious jade valuables.