Some hide the "Made in China" label in the bottom of an inside pocket or stamped black on black on the back side of a tiny logo flap.

有一些是将“中国制造”标签藏在袋子里面的底部，或者在一个很薄的商标牌黑色的背面打上黑色的印记。

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The 4 digits stamped on the bottom reference the lot number from when it was formulated.

瓶底4位数的喷码表示生产产品时候的一系列数字。

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The stamped arrow on bottom plate mounting and top cover gum label arrow must both point in direction of flow. (See page 6 for "Installation" and page 7 for "Flow rates and wiring information.

底盘上的模压箭头和顶盖上树脂标签箭头必须都指向流体流向。（请参阅第6页了解“安装”信息，参阅第7页了解“流量额定和接线信息”。）

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It is monochrome, with an extremely subtle pattern, and does not have a mark translating as "valuable Ding bowl" stamped on the bottom, making it look like a bowl found in Pottery Barn (and more commonly found at yard sales).

CNN: How to hunt for your own $2.2 million Ding bowl