Phono-semantic — one part hints at the meaning, another at the sound
Example phrases
河流曾是两个村庄之间天然的界线,如今却成了共同治理的生态走廊。Héliú céng shì liǎng ge cūnzhuāng zhījiān tiānrán de jièxiàn, rújīn què chéng le gòngtóng zhìlǐ de shēngtài zǒuláng.The river was once the natural boundary line between two villages, but it has now become an ecological corridor under joint management.
地上的白线是两个球场之间的界线。Dìshang de bái xiàn shì liǎng ge qiúchǎng zhījiān de jièxiàn.The white line on the ground is the dividing line between the two courts.
山脊就是这两个省的界线,翻过去就是另一个省了。Shānjǐ jiù shì zhè liǎng ge shěng de jièxiàn, fān guòqù jiù shì lìng yí ge shěng le.The mountain ridge is the dividing line between these two provinces; once you cross it you are in the other one.