Lao Zhang mingming zhidao Wang Huan (Lao Wang de erzi) ba neixie lingjian nazoule, keshi yao zugou de zhengju cai neng gaosu Lao Wangi zijii de erzi zai tou dongxi.
old Zhang clearly know Wang Huan old Wang GEN son BA those spare-parts take:leave but want sufficient REL proof then can tell old Wang self GEN son DUR steal thing(s)
Old Zhang clearly knew that Wang Huan (Old Wang's son) took those spare parts, but he needed sufficient proof before he could tell Old Wang that self's (Old Wang's) son was stealing things.