"Could it be that you over-fertilized, An Ping, burning the crops?" An Hao asked.
"We spread the fertilizer while tilling the soil; we wouldn't wait until they're mature to do so," An Shuchao exhaled a ring of smoke, speaking slowly, "There must be a problem inside."
"Mulling over it here won't solve the problem. Let's go back to the greenhouse and take another look," An Hao suggested.
"Alright. Let's go, then," An Shuchao stood up, dusted the dirt off his behind, and followed An Hao out.
"Sis, you guys go ahead. I'll tidy up a bit and come right over," An Ping said as he pulled the greenhouse key out of his pocket and handed it over to An Hao.
As soon as An Hao took the key, she felt something was off, "Dad, why does this key look so new?"
"A new key can't be new now?" An Shuchao found his daughter's question amusing.
"Where did the old keys go?"
