自训练的 PP-OCRv2 识别模型转换为 Lite .nb 后，Android 返回 9088!==128，不符合“可替换模型”文档的要求，请求提供与官方 .nb 图结构相同的 pdmodel 或导出脚本。

Environment:

• PaddleOCR: main/release/2.6 has been tried
• Paddle-Lite: 2.10 (consistent with Android)
• Operation: self-training ch_PP-OCRv2 rec, exporting with export_model (fixed input [3,32,320]), then converting to .nb with paddle_lite_opt, replacing the official Android demo/own app