“It wasn’t next to the body. Forensics found it over there.” He pointed to the west side of the clearing.

Li was thoughtful for a moment. “Anyone see him arriving?”

Qian made a moue with his lips and exhaled sharply through them. “Nobody’s come forward yet. We’re trying to get the names of everyone who was in the park from six this morning. A lot of them will be the same people who come every day. Someone might have seen a man carrying a can, but it isn’t much of a description to offer them. I’ve already spoken to the ticket clerk but she has no recollection. Until we know who he is and maybe get a photograph . . .” He shrugged.

“What about the people who found the body?”

“A nanny—a peasant girl from Shanxi province—and a couple of kids. They’re down there in the ambulance. The nanny was in a worse state than the kids. I think the paramedics have given her a sedative.”

When Li stepped into the ambulance, he was taken aback to see that the girls were twins. Pretty girls, unspoilt as yet by the approach of adulthood and the loss of innocence—unaware, perhaps, how lucky they were. Since the introduction of the One-Child Policy to control the population explosion, it was rare for any child to have a brother or sister. And a whole new generation would never know the joy of an extended family with uncles and aunts. There was no way of knowing the long-term effects on a society so orientated around the traditional family. But there was a reluctant acceptance by the Chinese that the alternative was worse—a spiralling population growth leading to inevitable starvation and economic chaos.

The girls regarded him solemnly, a strange outward calm concealing the trauma of what they must have witnessed. Their baby-sitter, on the other hand, was still sobbing feebly, clutching a damp handkerchief to her mouth, sucking on a corner of it for comfort.

“Hi.” Li sat down opposite them and spoke directly to the twins. “Did you girls see the dancers earlier?” They nodded eagerly. “And those guys that go swinging the swords about? They really scare me.” The girls giggled. “Do you come to the park every day?”

“No,” one of them said.

“Just sometimes,” the other added. “Usually with Mommy.”

Qian watched Li from the door, thinking what a good manner he had with the kids. Gentle, positive. And they responded to him.

“But you were with your nanny today?” They nodded again. “Did you see anyone near the path out there, before you went up to where the fire was?” This time it was a solemn shaking of the heads. “No one moving away, maybe round the lake?” Again the shaking of heads. “Good girls. You’ve done really well. But I don’t think you want to hang around here any longer, do you?”

“No,” they said in chorus.