http://sy3tqe5tvukyk35kbqx4v3xjj5jxkrvrcdno4c4neg5kymz3zb5avzqd.onion/Glossary/Chinese---Chinese-Union-Version-Simplified
Typically, the subjunctive mood indicates possiblity, not certainty. However, a subjunctive in a purpose clause is a resulting action as certain as the causal action. The subjunctive in a purpose clause functions as an indicative, not an optative.